cfi_flash: Cleanup flash_print_info()

This patch does the following:

- Extract code to detect if sector is erased into function
  sector_erased().
- Because of this, we don't have variable declarations inside the
  sector loop in flash_print_info()
- Change "return" to "break" in the "if (ctrlc()) statement:
  This fixes a problem with the resulting output. Before this
  patch the output was:

  Sector Start Addresses:
  FC000000        FC020000        FC040000   =>

  With this patch it is now:

  Sector Start Addresses:
  FC000000        FC020000        FC040000
  =>

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Kim Phillips <kim.phillips@freescale.com>
Cc: Wolfgang Denk <wd@denx.de>

drivers/mtd/cfi_flash.c

@@ -1096,8 +1096,30 @@ int flash_erase (flash_info_t * info, int s_first, int s_last)
 	return rcode;
 }
 
-/*-----------------------------------------------------------------------
- */
+#ifdef CONFIG_SYS_FLASH_EMPTY_INFO
+static int sector_erased(flash_info_t *info, int i)
+{
+	int k;
+	int size;
+	volatile unsigned long *flash;
+
+	/*
+	 * Check if whole sector is erased
+	 */
+	size = flash_sector_size(info, i);
+	flash = (volatile unsigned long *) info->start[i];
+	/* divide by 4 for longword access */
+	size = size >> 2;
+
+	for (k = 0; k < size; k++) {
+		if (*flash++ != 0xffffffff)
+			return 0;	/* not erased */
+	}
+
+	return 1;			/* erased */
+}
+#endif /* CONFIG_SYS_FLASH_EMPTY_INFO */
+
 void flash_print_info (flash_info_t * info)
 {
 	int i;
@@ -1162,33 +1184,14 @@ void flash_print_info (flash_info_t * info)
 	puts ("\n  Sector Start Addresses:");
 	for (i = 0; i < info->sector_count; ++i) {
 		if (ctrlc())
-			return;
+			break;
 		if ((i % 5) == 0)
-			printf ("\n");
+			putc('\n');
 #ifdef CONFIG_SYS_FLASH_EMPTY_INFO
-		int k;
-		int size;
-		int erased;
-		volatile unsigned long *flash;
-
-		/*
-		 * Check if whole sector is erased
-		 */
-		size = flash_sector_size(info, i);
-		erased = 1;
-		flash = (volatile unsigned long *) info->start[i];
-		size = size >> 2;	/* divide by 4 for longword access */
-		for (k = 0; k < size; k++) {
-			if (*flash++ != 0xffffffff) {
-				erased = 0;
-				break;
-			}
-		}
-
 		/* print empty and read-only info */
 		printf ("  %08lX %c %s ",
 			info->start[i],
-			erased ? 'E' : ' ',
+			sector_erased(info, i) ? 'E' : ' ',
 			info->protect[i] ? "RO" : "  ");
 #else	/* ! CONFIG_SYS_FLASH_EMPTY_INFO */
 		printf ("  %08lX   %s ",