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