drivers: pinctrl: wch_20x_30x_afio: fix afio remap

Enable the AFIO clock before remap. Otherwise, remap will not work.

Signed-off-by: Jianxiong Gu <jianxiong.gu@outlook.com>

Author: recalci

drivers/pinctrl/pinctrl_wch_20x_30x_afio.c

@@ -33,6 +33,10 @@ int pinctrl_configure_pins(const pinctrl_soc_pin_t *pins, uint8_t pin_cnt, uintp
 		uint32_t pcfr = pcfr_id == 0 ? AFIO->PCFR1 : AFIO->PCFR2;
 		uint8_t cfg = 0;
 
+		if (remap != 0) {
+			RCC->APB2PCENR |= RCC_AFIOEN;
+		}
+
 		if (pins->output_high || pins->output_low) {
 			cfg |= (pins->slew_rate + 1);
 			if (pins->drive_open_drain) {