ARM: configs: at91: enable config flags for sam9x7 SoC family

Enable config flags for SAM9X7 SoC for the sam9x7 SoC family.
Signed-off-by: Varshini Rajendran <varshini.rajendran@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Link: https://lore.kernel.org/r/20240729070923.1991418-1-varshini.rajendran@microchip.comSigned-off-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>

arch/arm/configs/at91_dt_defconfig

@@ -16,6 +16,7 @@ CONFIG_ARCH_AT91=y
 CONFIG_SOC_AT91RM9200=y
 CONFIG_SOC_AT91SAM9=y
 CONFIG_SOC_SAM9X60=y
+CONFIG_SOC_SAM9X7=y
 # CONFIG_ATMEL_CLOCKSOURCE_PIT is not set
 CONFIG_AEABI=y
 CONFIG_UACCESS_WITH_MEMCPY=y