usb: typec: tcpci: use GENMASK() for TCPC_TRANSMIT register fields

Convert all fields from register TCPC_TRANSMIT to using GENMASK() and
FIELD_PREP() so as to keep using a similar approach throughout the code
base and make it arguably easier to read.

Signed-off-by: André Draszik <[e-mail]>
Reviewed-by: Heikki Krogerus <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/usb/typec/tcpm/tcpci.c

···
 	}
 
 	/* nRetryCount is 3 in PD2.0 spec where 2 in PD3.0 spec */
-	reg = ((negotiated_rev > PD_REV20 ? PD_RETRY_COUNT_3_0_OR_HIGHER : PD_RETRY_COUNT_DEFAULT)
-	       << TCPC_TRANSMIT_RETRY_SHIFT) | (type << TCPC_TRANSMIT_TYPE_SHIFT);
+	reg = FIELD_PREP(TCPC_TRANSMIT_RETRY,
+			 (negotiated_rev > PD_REV20
+			  ? PD_RETRY_COUNT_3_0_OR_HIGHER
+			  : PD_RETRY_COUNT_DEFAULT));
+	reg |= FIELD_PREP(TCPC_TRANSMIT_TYPE, type);
 	ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg);
 	if (ret < 0)
 		return ret;

include/linux/usb/tcpci.h

···
 #define TCPC_RX_DATA			0x34 /* through 0x4f */
 
 #define TCPC_TRANSMIT			0x50
-#define TCPC_TRANSMIT_RETRY_SHIFT	4
-#define TCPC_TRANSMIT_RETRY_MASK	0x3
-#define TCPC_TRANSMIT_TYPE_SHIFT	0
-#define TCPC_TRANSMIT_TYPE_MASK		0x7
+#define TCPC_TRANSMIT_RETRY		GENMASK(5, 4)
+#define TCPC_TRANSMIT_TYPE		GENMASK(2, 0)
 
 #define TCPC_TX_BYTE_CNT		0x51
 #define TCPC_TX_HDR			0x52