Costmetic updates comments and style; Add NFS dependency on IPv4

arch/mips/src/pic32mx/pic32mx-config.h

@@ -600,7 +600,7 @@
 /* DEVCFG3 */
 
 #ifndef CONFIG_PIC32MX_USERID               /* User ID */
-#  define CONFIG_PIC32MX_USERID   0x584e    /* "NutX" */
+#  define CONFIG_PIC32MX_USERID   0x584e    /* "NX" */
 #endif
 
 #ifndef CONFIG_PIC32MX_PMDL1WAY             /* Peripheral module disable configuration */

fs/nfs/Kconfig

@@ -6,7 +6,7 @@
 config NFS
 	bool "NFS client file system"
 	default n
-	depends on NET_UDP && !DISABLE_MOUNTPOINT
+	depends on NET_UDP && NET_IPv4 && !DISABLE_MOUNTPOINT
 	select FS_READABLE
 	select FS_WRITABLE
 	---help---

include/sys/types.h

@@ -254,7 +254,7 @@ typedef unsigned short ushort;
 typedef unsigned int   uint;
 typedef unsigned long  ulong;
 typedef signed char    s_char;
-typedef char          *caddr_t;
+typedef FAR char      *caddr_t;
 
 /* Task entry point */