ARM: mach-meson: select MMC_PWRSEQ config

Before time, PWRSEQ is selected since below commit.
commit 262d34363373 ("board: amlogic: select PWRSEQ for all amlogic platform")
Select MMC_PWRSEQ config because of introducing CONFIG_MMC_PWRSEQ for
only eMMC module.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/arch/arm/mach-meson/Kconfig b/arch/arm/mach-meson/Kconfig
index 513a33d..6cba2c4 100644
--- a/arch/arm/mach-meson/Kconfig
+++ b/arch/arm/mach-meson/Kconfig
@@ -9,6 +9,7 @@
 	select SYSCON
 	select REGMAP
 	select PWRSEQ
+	select MMC_PWRSEQ
 	select BOARD_LATE_INIT
 	imply CMD_DM