qualcommax: add ramoops memory region

This patch adds support for allocating reserved memory for ramoops.
This is required to get PSTORE option working.

Tested with the following options:

```
CONFIG_PACKAGE_kmod-pstore=y
CONFIG_PACKAGE_kmod-ramoops=y
CONFIG_PACKAGE_kmod-reed-solomon=y
```

dmesg output
```
➤ dmesg | grep -Ei "psto|ramo"

[Sun Jun  9 23:22:01 2024] OF: reserved mem: 0x0000000051200000..0x00000000512fffff (1024 KiB) map non-reusable ramoops@51200000
[Sun Jun  9 23:22:05 2024] pstore: Using crash dump compression: deflate
[Sun Jun  9 23:22:05 2024] pstore: Registered ramoops as persistent store backend
[Sun Jun  9 23:22:05 2024] ramoops: using 0x100000@0x51200000, ecc: 0
```

Triggering kernel panic

```
sh -c 'echo 10 > /proc/sys/kernel/panic; echo c > /proc/sysrq-trigger'
```

After rebooting

```
mkdir -p /tmp/ramoops
mount -t pstore pstore /tmp/ramoops
```

```
➤ l /tmp/ramoops
drwxr-x---    2 root     root           0 Jun  9 23:02 .
drwxr-xr-x    8 root     root        4.0K Jun  9 23:23 ..
-r--r--r--    1 root     root        6.6K Jun  9 23:21 dmesg-ramoops-0
```

Truncated output
```
Panic#1 Part1
<6>[   21.656119] remoteproc remoteproc0: remote processor cd00000.q6v5_wcss is now up
<14>[   21.657910] kmodloader: done loading kernel modules from /etc/modules.d/*
<6>[   21.710545] ath11k c000000.wifi: chip_id 0x0 chip_family 0x0 board_id 0xff soc_id 0xffffffff
<6>[   21.710594] ath11k c000000.wifi: fw_version 0x270204a5 fw_build_timestamp 2022-08-04 13:05 fw_build_id WLAN.HK.2.7.0.1-01744-QCAHKSWPL_SILICONZ-1
<6>[   91.416867] br-lan: topology change detected, sending tcn bpdu
<6>[ 1256.023874] sysrq: Trigger a crash
<0>[ 1256.023911] Kernel panic - not syncing: sysrq triggered crash
<4>[ 1256.026176] CPU: 2 PID: 2842 Comm: sh Tainted: G           O       6.6.32 #0
<4>[ 1256.031993] Hardware name: Linksys MX5300 (DT)
<4>[ 1256.039106] Call trace:
<4>[ 1256.043354]  dump_backtrace+0xb0/0x10c
<4>[ 1256.045701]  show_stack+0x18/0x24
<4>[ 1256.049519]  dump_stack_lvl+0x48/0x60
<4>[ 1256.052906]  dump_stack+0x18/0x24
<4>[ 1256.056550]  panic+0x2d0/0x31c
<4>[ 1256.059848]  sysrq_handle_moom+0x0/0x30
<4>[ 1256.062800]  __handle_sysrq+0xe4/0x1e0
<4>[ 1256.066534]  write_sysrq_trigger+0xbc/0xfc
<4>[ 1256.070354]  proc_reg_write+0xb0/0xf8
<4>[ 1256.074434]  vfs_write+0xa4/0x298
<4>[ 1256.078165]  ksys_write+0x5c/0xe0
<4>[ 1256.081464]  __arm64_sys_write+0x1c/0x28
<4>[ 1256.084763]  invoke_syscall.constprop.0+0x5c/0x100
<4>[ 1256.088758]  do_el0_svc+0x40/0xc8
<4>[ 1256.093355]  el0_svc+0x30/0xb8
<4>[ 1256.096740]  el0t_64_sync_handler+0x120/0x12c
<4>[ 1256.099694]  el0t_64_sync+0x178/0x17c
<2>[ 1256.104122] SMP: stopping secondary CPUs
<0>[ 1256.107773] Kernel Offset: disabled
<0>[ 1256.111759] CPU features: 0x0,00000000,00000000,0000400b
<0>[ 1256.114975] Memory Limit: none
```

Signed-off-by: Sean Khan <[email protected]>

target/linux/qualcommax/patches-6.6/0911-arm64-dts-qcom-ipq8074-add-ramoops.patch

@@ -0,0 +1,25 @@
+--- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
++++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
+@@ -198,6 +198,12 @@
+ 			no-map;
+ 			reg = <0x0 0x51000000 0x0 0x100000>;
+ 		};
++
++		ramoops_region: ramoops@51200000 {
++			compatible = "ramoops";
++			reg = <0x0 0x51200000 0x0 0x100000>;
++			record-size = <0x1000>;
++		};
+ 	};
+
+ 	firmware {
+--- a/arch/arm64/boot/dts/qcom/ipq8074-512m.dtsi
++++ b/arch/arm64/boot/dts/qcom/ipq8074-512m.dtsi
+@@ -17,3 +17,7 @@
+ &m3_dump_region {
+ 	reg = <0x0 0x4e800000 0x0 0x100000>;
+ };
++
++&ramoops_region {
++	reg = <0x0 0x4e900000 0x0 0x100000>;
++};