arm64: dts: ti: k3-am62a7-sk: fix pinmux for main_uart1

main_uart1 reserved for TIFS firmware traces is routed to the
onboard FT4232 via a FET switch which is connected to pin A21 and
B21 of the SoC and not E17 and C17. Fix it.

Fixes: cf39ff1 ("arm64: dts: ti: k3-am62a7-sk: Describe main_uart1 and wkup_uart")
Cc: stable@vger.kernel.org
Signed-off-by: Hong Guan <hguan@ti.com>
[bb@ti.com: expanded commit message]
Signed-off-by: Bryan Brattlof <bb@ti.com>
Link: https://lore.kernel.org/r/20250707-uart-fixes-v1-1-8164147218b0@ti.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: Hong Guan

arch/arm64/boot/dts/ti/k3-am62a7-sk.dts

@@ -301,8 +301,8 @@
 
 	main_uart1_pins_default: main-uart1-default-pins {
 		pinctrl-single,pins = <
-			AM62AX_IOPAD(0x01e8, PIN_INPUT, 1) /* (C17) I2C1_SCL.UART1_RXD */
-			AM62AX_IOPAD(0x01ec, PIN_OUTPUT, 1) /* (E17) I2C1_SDA.UART1_TXD */
+			AM62AX_IOPAD(0x01ac, PIN_INPUT, 2) /* (B21) MCASP0_AFSR.UART1_RXD */
+			AM62AX_IOPAD(0x01b0, PIN_OUTPUT, 2) /* (A21) MCASP0_ACLKR.UART1_TXD */
 			AM62AX_IOPAD(0x0194, PIN_INPUT, 2) /* (C19) MCASP0_AXR3.UART1_CTSn */
 			AM62AX_IOPAD(0x0198, PIN_OUTPUT, 2) /* (B19) MCASP0_AXR2.UART1_RTSn */
 		>;