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/Lamobo_R1_defconfig b/configs/Lamobo_R1_defconfig
index 38eea97..cc29d60 100644
--- a/configs/Lamobo_R1_defconfig
+++ b/configs/Lamobo_R1_defconfig
@@ -2,13 +2,13 @@
 CONFIG_ARCH_SUNXI=y
 CONFIG_MACH_SUN7I=y
 CONFIG_DRAM_CLK=432
+CONFIG_MACPWR="PH23"
 CONFIG_MMC0_CD_PIN="PH10"
 CONFIG_SATAPWR="PB3"
 CONFIG_GMAC_TX_DELAY=4
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-lamobo-r1"
 CONFIG_AHCI=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SYS_EXTRA_OPTIONS="MACPWR=SUNXI_GPH(23)"
 CONFIG_SPL=y
 CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_IMLS is not set