ARM: shmobile: defconfig: Update for renesas-drivers

Update the defconfig for Renesas ARM systems:
  - Compile the kernel with warnings as errors,
  - Enable Renesas RZ/N1 ADC support.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
diff --git a/arch/arm/configs/shmobile_defconfig b/arch/arm/configs/shmobile_defconfig
index c1fd469..5218b72 100644
--- a/arch/arm/configs/shmobile_defconfig
+++ b/arch/arm/configs/shmobile_defconfig
@@ -1,3 +1,4 @@
+CONFIG_WERROR=y
 CONFIG_SYSVIPC=y
 CONFIG_NO_HZ_IDLE=y
 CONFIG_IKCONFIG=y
@@ -203,6 +204,7 @@
 CONFIG_ARM_GT_INITIAL_PRESCALER_VAL=1
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_IIO=y
+CONFIG_RZN1_ADC=y
 CONFIG_AK8975=y
 CONFIG_PWM=y
 CONFIG_PWM_RENESAS_RCAR=y