kdb: kdb_main: refactor code in kdb_md_line

Replace the whole switch statement with a for loop.  This makes the
code clearer and easy to read.

This also addresses the following Coverity warnings:

Addresses-Coverity-ID: 115090 ("Missing break in switch")
Addresses-Coverity-ID: 115091 ("Missing break in switch")
Addresses-Coverity-ID: 114700 ("Missing break in switch")
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
[daniel.thompson@linaro.org: Tiny grammar change in description]
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>

kernel/debug/kdb/kdb_main.c

@@ -1493,6 +1493,7 @@ static void kdb_md_line(const char *fmtstr, unsigned long addr,
 	char cbuf[32];
 	char *c = cbuf;
 	int i;
+	int j;
 	unsigned long word;
 
 	memset(cbuf, '\0', sizeof(cbuf));
@@ -1538,25 +1539,9 @@ static void kdb_md_line(const char *fmtstr, unsigned long addr,
 			wc.word = word;
 #define printable_char(c) \
 	({unsigned char __c = c; isascii(__c) && isprint(__c) ? __c : '.'; })
-			switch (bytesperword) {
-			case 8:
+			for (j = 0; j < bytesperword; j++)
 				*c++ = printable_char(*cp++);
-				*c++ = printable_char(*cp++);
-				*c++ = printable_char(*cp++);
-				*c++ = printable_char(*cp++);
-				addr += 4;
-			case 4:
-				*c++ = printable_char(*cp++);
-				*c++ = printable_char(*cp++);
-				addr += 2;
-			case 2:
-				*c++ = printable_char(*cp++);
-				addr++;
-			case 1:
-				*c++ = printable_char(*cp++);
-				addr++;
-				break;
-			}
+			addr += bytesperword;
 #undef printable_char
 		}
 	}