arm64: defconfig: Enable PSTORE_RAM

Enable PSTORE_RAM, that is the ramoops driver, in the defconfig, to
allow logging and retrieving panics and oopses to/from RAM automatically
for platforms that have a ramoops reserved memory node in DT.
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Reviewed-by: David Heidelberg <david@ixit.cz>
Link: https://lore.kernel.org/r/20240110210600.787703-3-nfraprado@collabora.comSigned-off-by: Kees Cook <keescook@chromium.org>

arch/arm64/configs/defconfig

@@ -1590,6 +1590,7 @@ CONFIG_CONFIGFS_FS=y
 CONFIG_EFIVAR_FS=y
 CONFIG_UBIFS_FS=m
 CONFIG_SQUASHFS=y
+CONFIG_PSTORE_RAM=m
 CONFIG_NFS_FS=y
 CONFIG_NFS_V4=y
 CONFIG_NFS_V4_1=y