sunxi: pmic_bus: Fix Kconfig dependencies

AXP_PMIC_BUS enables communication with a specific AXP PMIC at a
PMIC-dependent I2C/P2WI/RSB bus address. It is automatically selected
as a dependency of the PMIC driver. It should not be selectable by the
user when no PMIC is chosen.

AXP_GPIO uses the pmic_bus functions, and also depends on a specific
PMIC header to pick up register definitions.

Both of these changes have no impact on any existing configs, since
the code does not compile if the dependencies are not met.

Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index 03054a3..da35cc8 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -106,7 +106,7 @@
 	  in A31 SoC.
 
 config AXP_PMIC_BUS
-	bool "Sunxi AXP PMIC bus access helpers"
+	bool
 	help
 	  Select this PMIC bus access helpers for Sunxi platform PRCM or other
 	  AXP family PMIC devices.
@@ -795,6 +795,7 @@
 
 config AXP_GPIO
 	bool "Enable support for gpio-s on axp PMICs"
+	depends on AXP_PMIC_BUS
 	---help---
 	Say Y here to enable support for the gpio pins of the axp PMIC ICs.