power: pmic: Add NXP PCA9451A PMIC support

PCA9451A uses similar BUCKs and LDO regulators as PCA9450B/C but
has LDO2 and LDO3 removed. So reuse pca9450 PMIC and regulator driver
and add new type for PCA9451A.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Marek Vasut <marex@denx.de>

include/power/pca9450.h

@@ -59,6 +59,7 @@ int power_pca9450_init(unsigned char bus, unsigned char addr);
 enum {
 	NXP_CHIP_TYPE_PCA9450A = 0,
 	NXP_CHIP_TYPE_PCA9450BC,
+	NXP_CHIP_TYPE_PCA9451A,
 	NXP_CHIP_TYPE_AMOUNT
 };