allwinner: a64: power: Remove obsolete register check

As of a561e41b

 ("allwinner: power: add enable switches for DCDC1/5")
there are no longer regulators without an enable register provided.
Since it seems reasonable that this will continue to be the case, drop
the check.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Change-Id: Icd7ec26fc6450d053e6e6d855fc16229b1d65a39

plat/allwinner/sun50i_a64/sunxi_power.c

@@ -212,7 +212,6 @@ static int setup_regulator(const void *fdt, int node,
 		regval = ((regval - reg->split) / 2) + reg->split;
 
 	axp_write(reg->volt_reg, regval);
-	if (reg->switch_reg < 0xff)
 	axp_setbits(reg->switch_reg, BIT(reg->switch_bit));
 
 	INFO("PMIC: AXP803: %s voltage: %d.%03dV\n", reg->dt_name,