sunxi: Convert CONFIG_MACPWR to Kconfig

Convert the CONFIG_MACPWR to Kconfig and update all the sunxi defconfigs
that used it in SYS_EXTRA_OPTIONS.

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/configs/orangepi_plus2e_defconfig b/configs/orangepi_plus2e_defconfig
index 366b804..52ec86a4 100644
--- a/configs/orangepi_plus2e_defconfig
+++ b/configs/orangepi_plus2e_defconfig
@@ -4,10 +4,10 @@
 CONFIG_DRAM_CLK=672
 CONFIG_DRAM_ZQ=3881979
 CONFIG_DRAM_ODT_EN=y
+CONFIG_MACPWR="PD6"
 CONFIG_MMC_SUNXI_SLOT_EXTRA=2
 CONFIG_DEFAULT_DEVICE_TREE="sun8i-h3-orangepi-plus2e"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SYS_EXTRA_OPTIONS="MACPWR=SUNXI_GPD(6)"
 CONFIG_CONSOLE_MUX=y
 CONFIG_SPL=y
 CONFIG_SPL_I2C_SUPPORT=y