sunxi: Convert CONFIG_SATAPWR to Kconfig

Convert the CONFIG_SATAPWR into kconfig.
Thanks to that, many SYS_EXTRA_OPTIONS can be removed from some
defconfigs.

Signed-off-by: Mylène Josserand <mylene.josserand@free-electrons.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
diff --git a/configs/Linksprite_pcDuino3_Nano_defconfig b/configs/Linksprite_pcDuino3_Nano_defconfig
index 38adfc0..80416cb 100644
--- a/configs/Linksprite_pcDuino3_Nano_defconfig
+++ b/configs/Linksprite_pcDuino3_Nano_defconfig
@@ -4,11 +4,11 @@
 CONFIG_DRAM_CLK=408
 CONFIG_DRAM_ZQ=122
 CONFIG_USB1_VBUS_PIN="PH11"
+CONFIG_SATAPWR="PH2"
 CONFIG_GMAC_TX_DELAY=3
 CONFIG_DEFAULT_DEVICE_TREE="sun7i-a20-pcduino3-nano"
 CONFIG_AHCI=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
-CONFIG_SYS_EXTRA_OPTIONS="SATAPWR=SUNXI_GPH(2)"
 CONFIG_SPL=y
 CONFIG_SPL_I2C_SUPPORT=y
 # CONFIG_CMD_IMLS is not set