mb/{amd/padmelon,google/zork}: Do not select `VGA_BIOS`

The VGA BIOS for AMD Padmelon and Google Zork are stored in `amd_blobs`.
Do not force inclusion of VGA BIOS when `USE_AMD_BLOBS` is not enabled.

Change-Id: I206e8fadc14ec0d9b162dc4d72813fdd3d43958b
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51341
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>

src/mainboard/amd/padmelon/Kconfig

@@ -16,7 +16,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SUPERIO_FINTEK_COMMON_PRE_RAM
 	select SUPERIO_FINTEK_FAN_CONTROL
 	select SUPERIO_FINTEK_FAN_API_CALL
-	select VGA_BIOS
 	select AZALIA_PLUGIN_SUPPORT
 
 config MAINBOARD_DIR
@@ -49,6 +48,9 @@ config IRQ_SLOT_COUNT
 	int
 	default 11
 
+config VGA_BIOS
+	default y if USE_AMD_BLOBS
+
 config HWM_PORT
 	hex
 	default 0x0225

src/mainboard/google/zork/Kconfig

@@ -13,7 +13,6 @@ config BOARD_SPECIFIC_OPTIONS
 	select SOC_AMD_COMMON_BLOCK_USE_ESPI
 	select SOC_AMD_PICASSO
 	select SOC_AMD_COMMON_BLOCK_GRAPHICS_ATIF
-	select VGA_BIOS
 	select BOARD_ROMSIZE_KB_16384
 	select DRIVERS_AMD_I2S_MACHINE_DEV
 	select DISABLE_SPI_FLASH_ROM_SHARING
@@ -105,6 +104,9 @@ config ONBOARD_VGA_IS_PRIMARY
 	bool
 	default y
 
+config VGA_BIOS
+	default y if USE_AMD_BLOBS
+
 config VBOOT
 	select EC_GOOGLE_CHROMEEC_SWITCHES
 	select VBOOT_LID_SWITCH