Staging: rtl8192e: Refactored rtllib_modes

The initial reason for looking at this code was an
issue raised by checkpatch.pl:

     $ ./scripts/checkpatch.pl --terse -f drivers/staging/rtl8192e/rtllib_wx.c
     CHECK: Please use a blank line after function/struct/union/enum
     declarations

The additional blank line above the struct/before the headers is
just cleaner.

However, as it turns out since there is no str formatting required
One can replace the error prone str + size struct with a char array.
The rest of this patch fixes the usecases.
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Signed-off-by: Felix Schlepper <f3sch.git@outlook.com>
Link: https://lore.kernel.org/r/4dbc4939e88a2c94f1819b4b0cc2c81dc332710b.1656667089.git.f3sch.git@outlook.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtllib_wx.c

@@ -17,17 +17,9 @@
 #include <linux/module.h>
 #include <linux/etherdevice.h>
 #include "rtllib.h"
-struct modes_unit {
-	char *mode_string;
-	int mode_size;
-};
-static struct modes_unit rtllib_modes[] = {
-	{"a", 1},
-	{"b", 1},
-	{"g", 1},
-	{"?", 1},
-	{"N-24G", 5},
-	{"N-5G", 4},
+
+static const char * const rtllib_modes[] = {
+	"a", "b", "g", "?", "N-24G", "N-5G"
 };
 
 #define MAX_CUSTOM_LEN 64
@@ -72,10 +64,9 @@ static inline char *rtl819x_translate_scan(struct rtllib_device *ieee,
 	/* Add the protocol name */
 	iwe.cmd = SIOCGIWNAME;
 	for (i = 0; i < ARRAY_SIZE(rtllib_modes); i++) {
-		if (network->mode&(1<<i)) {
-			sprintf(pname, rtllib_modes[i].mode_string,
-				rtllib_modes[i].mode_size);
-			pname += rtllib_modes[i].mode_size;
+		if (network->mode & BIT(i)) {
+			strcpy(pname, rtllib_modes[i]);
+			pname += strlen(rtllib_modes[i]);
 		}
 	}
 	*pname = '\0';