clk: mediatek: mt7981: fix wrong mux width for pwm2 and pwm1 clock

Fix wrong mux width for pwm2 and pwm1. Upstream have width 1 but U-Boot
have width set to 2. Change the value to follow upstream implementation.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
diff --git a/drivers/clk/mediatek/clk-mt7981.c b/drivers/clk/mediatek/clk-mt7981.c
index 69d018b..6e770de 100644
--- a/drivers/clk/mediatek/clk-mt7981.c
+++ b/drivers/clk/mediatek/clk-mt7981.c
@@ -404,9 +404,9 @@
 	INFRA_MUX(CK_INFRA_SPI2_SEL, "infra_spi2_sel", infra_spi0_parents, 0x10,
 		  6, 1),
 	INFRA_MUX(CK_INFRA_PWM1_SEL, "infra_pwm1_sel", infra_pwm1_parents, 0x10,
-		  9, 2),
+		  9, 1),
 	INFRA_MUX(CK_INFRA_PWM2_SEL, "infra_pwm2_sel", infra_pwm1_parents, 0x10,
-		  11, 2),
+		  11, 1),
 	INFRA_MUX(CK_INFRA_PWM_BSEL, "infra_pwm_bsel", infra_pwm_bsel_parents,
 		  0x10, 13, 2),
 	INFRA_MUX(CK_INFRA_PCIE_SEL, "infra_pcie_sel", infra_pcie_parents, 0x20,