ARM: at91/Kconfig: remove unused config options

When removing old board !DT support, several Kconfig options were deleted.
Propagate this removal to drivers Kconfig files.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 7e024f1..aa96e37 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -1124,7 +1124,6 @@
 	int
 	range 0 1
 	default 0
-	prompt "RTT module Number" if ARCH_AT91SAM9263
 	depends on RTC_DRV_AT91SAM9
 	help
 	  More than one RTT module is available. You can choose which
@@ -1133,8 +1132,7 @@
 
 config RTC_DRV_AT91SAM9_GPBR
 	int
-	range 0 3 if !ARCH_AT91SAM9263
-	range 0 15 if ARCH_AT91SAM9263
+	range 0 3
 	default 0
 	prompt "Backup Register Number"
 	depends on RTC_DRV_AT91SAM9