board/orangepi/orangepi-r1/genimage.cfg: remove double quotes around partition-type-uuid values

This allows to comply with the recently specified genimage.cfg writing
rules.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

board/orangepi/orangepi-r1/genimage.cfg

@@ -28,7 +28,7 @@ image sdcard.img {
 	}
 
 	partition boot {
-		partition-type-uuid = "U"
+		partition-type-uuid = U
 		bootable = "true"
 		image = "boot.vfat"
 	}
@@ -36,7 +36,7 @@ image sdcard.img {
 	# 'rootfs' will be used as the partition label, used
 	# with root=PARTLABEL=rootfs kernel command line
 	partition rootfs {
-		partition-type-uuid = "L"
+		partition-type-uuid = L
 		image = "rootfs.ext4"
 		size = 512M
 	}