ARM: dts: rockchip: Update regulator name for PX3

The regulator name of SWITCH_REG1 does not match any other board
with a rk818 PMIC, nor does it correspond to a regulator in the
rk808-regulator driver. Changing name to SWITCH_REG which is
consistent with other boards and is in the driver.
Signed-off-by: NChris Morgan <macromorgan@hotmail.com>
Reviewed-by: NRobin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220303203958.4904-4-macroalpha82@gmail.comSigned-off-by: NHeiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3188-px3-evb.dts

@@ -212,7 +212,7 @@
 				regulator-name = "wl_18";
 			};
 
-			lcd_33: SWITCH_REG1 {
+			lcd_33: SWITCH_REG {
 				regulator-name = "lcd_33";
 			};
 		};