Convert CONFIG_IOMUX_SHARE_CONF_REG et al to Kconfig

This converts the following to Kconfig:
   CONFIG_IOMUX_LPSR
   CONFIG_IOMUX_SHARE_CONF_REG

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/arch/arm/mach-imx/mx7/Kconfig b/arch/arm/mach-imx/mx7/Kconfig
index 3c38818..0bb18f6 100644
--- a/arch/arm/mach-imx/mx7/Kconfig
+++ b/arch/arm/mach-imx/mx7/Kconfig
@@ -6,6 +6,7 @@
 	select ARCH_SUPPORT_PSCI
 	select CPU_V7_HAS_NONSEC
 	select CPU_V7_HAS_VIRT
+	select IOMUX_LPSR
 	select ROM_UNIFIED_SECTIONS
 	select SYSCOUNTER_TIMER
 	imply CMD_FUSE