Make arm64 serial port config compatible with crosvm

BUG: 118442619
Test: Ran ~/bin/crosvm run --disable-sandbox ~/image, saw output
Change-Id: If086af28b69eca5353a101228ae986653bc1465e
Signed-off-by: Greg Hartman <ghartman@google.com>
(cherry picked from commit 2860dfe869a94c8c1950effb55da116f83ebc740)
diff --git a/arch/arm64/configs/cuttlefish_defconfig b/arch/arm64/configs/cuttlefish_defconfig
index 1aac330e..c4ce7cc 100644
--- a/arch/arm64/configs/cuttlefish_defconfig
+++ b/arch/arm64/configs/cuttlefish_defconfig
@@ -54,8 +54,6 @@
 CONFIG_SETEND_EMULATION=y
 CONFIG_ARM64_SW_TTBR0_PAN=y
 CONFIG_RANDOMIZE_BASE=y
-CONFIG_CMDLINE="console=ttyAMA0"
-CONFIG_CMDLINE_EXTEND=y
 # CONFIG_EFI is not set
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_COMPAT=y
@@ -260,6 +258,7 @@
 CONFIG_SERIAL_8250_SHARE_IRQ=y
 CONFIG_SERIAL_AMBA_PL011=y
 CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
+CONFIG_SERIAL_OF_PLATFORM=y
 CONFIG_VIRTIO_CONSOLE=y
 CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
@@ -356,6 +355,7 @@
 # CONFIG_MMC_BLOCK is not set
 CONFIG_RTC_CLASS=y
 # CONFIG_RTC_SYSTOHC is not set
+CONFIG_RTC_DRV_PL030=y
 CONFIG_RTC_DRV_PL031=y
 CONFIG_VIRTIO_PCI=y
 # CONFIG_VIRTIO_PCI_LEGACY is not set