ANDROID: Revert "GKI: build in a kernel command line of "rw""

This reverts commit cc47b201a8.

Bug: 173425293

Reason for revert: Android platform has adapted devices with and
without a dedicated recovery partition, so the ramdisk no longer
needs to be writable.

Change-Id: Ib743e94197eadccbe877811e3a78aaa969960ea8
Signed-off-by: Yifan Hong <elsk@google.com>

arch/arm64/configs/gki_defconfig

@@ -60,8 +60,6 @@ CONFIG_SETEND_EMULATION=y
 # CONFIG_ARM64_VHE is not set
 CONFIG_RANDOMIZE_BASE=y
 # CONFIG_RANDOMIZE_MODULE_REGION_FULL is not set
-CONFIG_CMDLINE="rw"
-CONFIG_CMDLINE_EXTEND=y
 # CONFIG_DMI is not set
 CONFIG_PM_WAKELOCKS=y
 CONFIG_PM_WAKELOCKS_LIMIT=0

arch/x86/configs/gki_defconfig

@@ -52,8 +52,6 @@ CONFIG_HYPERVISOR_GUEST=y
 CONFIG_PARAVIRT=y
 CONFIG_NR_CPUS=32
 CONFIG_EFI=y
-CONFIG_CMDLINE_BOOL=y
-CONFIG_CMDLINE="rw"
 CONFIG_PM_WAKELOCKS=y
 CONFIG_PM_WAKELOCKS_LIMIT=0
 # CONFIG_PM_WAKELOCKS_GC is not set