mtd: mtdswap: make array 'name' static const, shrinks object size

Don't populate the read-only array 'name' on the stack but instead
make it static and constify it. Makes the object code smaller by 35
bytes:

Before:
text data bss dec hex filename
26304 4444 352 31100 797c drivers/mtd/mtdswap.o

After:
text data bss dec hex filename
26205 4508 352 31065 7959 drivers/mtd/mtdswap.o

(gcc version 7.2.0 x86_64)

Signed-off-by: Colin Ian King <[e-mail]>
Signed-off-by: Boris Brezillon <[e-mail]>

drivers/mtd/mtdswap.c

···
 	unsigned int max[MTDSWAP_TREE_CNT];
 	unsigned int i, cw = 0, cwp = 0, cwecount = 0, bb_cnt, mapped, pages;
 	uint64_t use_size;
-	char *name[] = {"clean", "used", "low", "high", "dirty", "bitflip",
-			"failing"};
+	static const char * const name[] = {
+		"clean", "used", "low", "high", "dirty", "bitflip", "failing"
+	};
 
 	mutex_lock(&d->mbd_dev->lock);