pinctrl: sunxi: Fix H616 I2S3 pin data

Two bugs have sneaked in the H616 pinctrl data:
- PH9 uses the mux value of 0x3 twice (one should be 0x5 instead)
- PH8 and PH9 use the "i2s3" function name twice in each pin

For the double pin name we use the same trick we pulled for i2s0: append
the pin function to the group name to designate the special function.

Fixes: 25adc29407fb ("pinctrl: sunxi: Add support for the Allwinner H616 pin controller")
Reported-by: SASANO Takayoshi <[e-mail]>
Signed-off-by: Andre Przywara <[e-mail]>
Reviewed-by: Jernej Skrabec <[e-mail]>
Reviewed-by: Samuel Holland <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/sunxi/pinctrl-sun50i-h616.c

···
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
 		  SUNXI_FUNCTION(0x2, "uart2"),		/* CTS */
-		  SUNXI_FUNCTION(0x3, "i2s3"),	/* DO0 */
+		  SUNXI_FUNCTION(0x3, "i2s3_dout0"),	/* DO0 */
 		  SUNXI_FUNCTION(0x4, "spi1"),		/* MISO */
-		  SUNXI_FUNCTION(0x5, "i2s3"),	/* DI1 */
+		  SUNXI_FUNCTION(0x5, "i2s3_din1"),	/* DI1 */
 		  SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 8)),	/* PH_EINT8 */
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 9),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),
 		  SUNXI_FUNCTION(0x1, "gpio_out"),
-		  SUNXI_FUNCTION(0x3, "i2s3"),	/* DI0 */
+		  SUNXI_FUNCTION(0x3, "i2s3_din0"),	/* DI0 */
 		  SUNXI_FUNCTION(0x4, "spi1"),		/* CS1 */
-		  SUNXI_FUNCTION(0x3, "i2s3"),	/* DO1 */
+		  SUNXI_FUNCTION(0x5, "i2s3_dout1"),	/* DO1 */
 		  SUNXI_FUNCTION_IRQ_BANK(0x6, 6, 9)),	/* PH_EINT9 */
 	SUNXI_PIN(SUNXI_PINCTRL_PIN(H, 10),
 		  SUNXI_FUNCTION(0x0, "gpio_in"),