ARM: at91: sama5_defconfig: remove STAGING

There is no driver requiring STAGING so we remove it.

Signed-off-by: Cristian Birsan <cristian.birsan@microchip.com>

Author: cristibirsan

arch/arm/configs/sama5_defconfig

@@ -282,7 +282,6 @@ CONFIG_RTC_DRV_AT91RM9200=y
 CONFIG_DMADEVICES=y
 CONFIG_AT_HDMAC=y
 CONFIG_AT_XDMAC=y
-CONFIG_STAGING=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_IIO=y
 CONFIG_AT91_ADC=y