There are many ways to add external RTC to Raspberry Pi boards. Let's
include support for this for the whole target and while at it, sort
features alphabetically.
Fixes: #9594
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
ARCH:=arm
BOARD:=bcm27xx
BOARDNAME:=Broadcom BCM27xx
-FEATURES:=ext4 audio usb usbgadget display gpio fpu squashfs rootfs-part boot-part
+FEATURES:=audio boot-part display ext4 fpu gpio rootfs-part rtc squashfs usb usbgadget
SUBTARGETS:=bcm2708 bcm2709 bcm2710 bcm2711
KERNEL_PATCHVER=5.10