build: Enable CONFIG_FW_CFG_SYSFS_CMDLINE as default configs

This enables integration test of the `fw_cfg` device [1].

[1] cloud-hypervisor/cloud-hypervisor#7117

Signed-off-by: Bo Chen <bchen@crusoe.ai>

Author: likebreath

arch/arm64/configs/ch_defconfig

@@ -1366,7 +1366,8 @@ CONFIG_PROC_EVENTS=y
 CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=y
-# CONFIG_FW_CFG_SYSFS is not set
+CONFIG_FW_CFG_SYSFS=y
+# CONFIG_FW_CFG_SYSFS_CMDLINE is not set
 # CONFIG_SYSFB_SIMPLEFB is not set
 # CONFIG_ARM_FFA_TRANSPORT is not set
 # CONFIG_GOOGLE_FIRMWARE is not set

arch/x86/configs/ch_defconfig

@@ -1367,7 +1367,8 @@ CONFIG_FIRMWARE_MEMMAP=y
 CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=y
 CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
-# CONFIG_FW_CFG_SYSFS is not set
+CONFIG_FW_CFG_SYSFS=y
+# CONFIG_FW_CFG_SYSFS_CMDLINE is not set
 # CONFIG_SYSFB_SIMPLEFB is not set
 # CONFIG_GOOGLE_FIRMWARE is not set