mips: mtmips: select essential drivers in Kconfig

Some drivers (clk, pinctrl, reset, ...) are necessary for reset of the
system, they should be always selected.

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f5d81b8..eb1f67d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -76,12 +76,18 @@
 
 config ARCH_MTMIPS
 	bool "Support MediaTek MIPS platforms"
+	select CLK
 	imply CMD_DM
 	select DISPLAY_CPUINFO
 	select DM
 	imply DM_ETH
 	imply DM_GPIO
+	select DM_RESET
 	select DM_SERIAL
+	select PINCTRL
+	select PINMUX
+	select PINCONF
+	select RESET_MTMIPS
 	imply DM_SPI
 	imply DM_SPI_FLASH
 	select LAST_STAGE_INIT
diff --git a/arch/mips/mach-mtmips/Kconfig b/arch/mips/mach-mtmips/Kconfig
index 4af2d54..c8dcf19 100644
--- a/arch/mips/mach-mtmips/Kconfig
+++ b/arch/mips/mach-mtmips/Kconfig
@@ -13,6 +13,8 @@
 config SOC_MT7628
 	bool "MT7628"
 	select MIPS_L1_CACHE_SHIFT_5
+	select PINCTRL_MT7628
+	select MTK_SERIAL
 	help
 	  This supports MediaTek MT7628/MT7688.