imx93_evk: spl: update pmic settings

1. Use runtime voltage selection for LD/OD/ND mode.
2. According to latest PE/TE report, the voltages of VDD_SOC for
   LD and ND mode need add 50mv margin, so LD voltage is 0.75v->0.8v,
   ND voltage is 0.8v->0.85v.
3. Use TOFF_DEB to differentiate new trimmed pmic and old pmic

Signed-off-by: Peng Fan <peng.fan@nxp.com>

include/power/pca9450.h

@@ -54,6 +54,8 @@ enum {
 	PCA9450_REG_NUM,
 };
 
+#define PCA9450_REG_PWRCTRL_TOFF_DEB    BIT(5)
+
 int power_pca9450_init(unsigned char bus, unsigned char addr);
 
 enum {