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/board/sunxi/Kconfig b/board/sunxi/Kconfig
index aa6b84b..87f282a 100644
--- a/board/sunxi/Kconfig
+++ b/board/sunxi/Kconfig
@@ -345,6 +345,13 @@
 	Set this to enable various workarounds for old kernels, this results in
 	sub-optimal settings for newer kernels, only enable if needed.
 
+config MACPWR
+	string "MAC power pin"
+	default ""
+	help
+	  Set the pin used to power the MAC. This takes a string in the format
+	  understood by sunxi_name_to_gpio, e.g. PH1 for pin 1 of port H.
+
 config MMC0_CD_PIN
 	string "Card detect pin for mmc0"
 	default "PF6" if MACH_SUN8I_A83T || MACH_SUNXI_H3_H5 || MACH_SUN50I