ARM: dts: am335x-evm: Fix 5th NAND partition's name

The 5th NAND partition should be named "NAND.u-boot-spl-os"
instead of "NAND.u-boot-spl". This is to be consistent with other
TI boards as well as u-boot.

Fixes: 91994fac ("ARM: dts: am335x-evm: NAND: update MTD partition table")
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-evm.dts

@@ -489,7 +489,7 @@ partition@3 {
 			reg = <0x00060000 0x00020000>;
 		};
 		partition@4 {
-			label = "NAND.u-boot-spl";
+			label = "NAND.u-boot-spl-os";
 			reg = <0x00080000 0x00040000>;
 		};
 		partition@5 {