configs: set QEMU_FW_CFG module built-in for qboot

cloud-init can use qemu_fw_cfg module to configure user password. It can
reduce 3~5s boot time.
Signed-off-by: NShile Zhang <shile.zhang@linux.alibaba.com>

config-4.19.y-x86_64

@@ -634,7 +634,7 @@ CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=y
 CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
 # CONFIG_ISCSI_IBFT is not set
-CONFIG_FW_CFG_SYSFS=m
+CONFIG_FW_CFG_SYSFS=y
 # CONFIG_FW_CFG_SYSFS_CMDLINE is not set
 # CONFIG_GOOGLE_FIRMWARE is not set
 

config-4.19.y-x86_64-debug

@@ -639,7 +639,7 @@ CONFIG_DMIID=y
 CONFIG_DMI_SYSFS=y
 CONFIG_DMI_SCAN_MACHINE_NON_EFI_FALLBACK=y
 # CONFIG_ISCSI_IBFT is not set
-CONFIG_FW_CFG_SYSFS=m
+CONFIG_FW_CFG_SYSFS=y
 # CONFIG_FW_CFG_SYSFS_CMDLINE is not set
 # CONFIG_GOOGLE_FIRMWARE is not set