mb/asus/h61-series: Always select `INTEL_INT15`

The mainboard.c guard was only added to preserve reproducibility when
unifying the boards. The `install_intel_vga_int15_handler` function does
nothing when `VGA_ROM_RUN` is not selected. Remove the guard and always
select `INTEL_INT15` for simplicity.

Change-Id: If51a0ab1c57b0856018a62cf669e5d1b53e5333c
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54379
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/asus/h61-series/Kconfig

@@ -5,6 +5,7 @@ config BOARD_ASUS_H61_SERIES
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES
 	select INTEL_GMA_HAVE_VBT
+	select INTEL_INT15
 	select MAINBOARD_HAS_LIBGFXINIT
 	select NORTHBRIDGE_INTEL_SANDYBRIDGE
 	select SERIRQ_CONTINUOUS_MODE

src/mainboard/asus/h61-series/Kconfig.name

@@ -4,7 +4,6 @@ config BOARD_ASUS_H61M_CS
 	select BOARD_ROMSIZE_KB_8192
 	select HAVE_CMOS_DEFAULT
 	select HAVE_OPTION_TABLE
-	select INTEL_INT15
 	select NO_UART_ON_SUPERIO
 	select SUPERIO_NUVOTON_NCT6779D
 
@@ -14,7 +13,6 @@ config BOARD_ASUS_P8H61_M_LX
 	select BOARD_ROMSIZE_KB_4096
 	select HAVE_CMOS_DEFAULT
 	select HAVE_OPTION_TABLE
-	select INTEL_INT15
 	select REALTEK_8168_RESET
 	select RT8168_SET_LED_MODE
 	select SUPERIO_NUVOTON_COMMON_COM_A

src/mainboard/asus/h61-series/mainboard.c

@@ -1,8 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-/* TODO: remove */
-#if CONFIG(INTEL_INT15)
-
 #include <device/device.h>
 #include <drivers/intel/gma/int15.h>
 
@@ -16,5 +13,3 @@ static void mainboard_enable(struct device *dev)
 struct chip_operations mainboard_ops = {
 	.enable_dev = mainboard_enable,
 };
-
-#endif