Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/pmcs-msp71xx/msp_usb.c b/arch/mips/pmcs-msp71xx/msp_usb.c
index c87c5f8..d38ac70 100644
--- a/arch/mips/pmcs-msp71xx/msp_usb.c
+++ b/arch/mips/pmcs-msp71xx/msp_usb.c
@@ -133,13 +133,13 @@
 	 * "D" for device-mode.	 If it works for Ethernet, why not USB...
 	 *  -- hammtrev, 2007/03/22
 	 */
-	snprintf((char *)&envstr[0], sizeof(envstr), "usbmode");
+	snprintf(&envstr[0], sizeof(envstr), "usbmode");
 
 	/* set default host mode */
 	val = 1;
 
 	/* get environment string */
-	strp = prom_getenv((char *)&envstr[0]);
+	strp = prom_getenv(&envstr[0]);
 	if (strp) {
 		/* compare string */
 		if (!strcmp(strp, "device"))