lib/vsprintf.c: remove %Z support

Now that %z is standartised in C99 there is no reason to support %Z.
Unlike %L it doesn't even make format strings smaller.

Use BUILD_BUG_ON in a couple ATM drivers.

In case anyone didn't notice lib/vsprintf.o is about half of SLUB which
is in my opinion is quite an achievement.  Hopefully this patch inspires
someone else to trim vsprintf.c more.

Link: http://lkml.kernel.org/r/20170103230126.GA30170@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/ide/ide-acpi.c

@@ -447,7 +447,7 @@ void ide_acpi_get_timing(ide_hwif_t *hwif)
 	memcpy(&hwif->acpidata->gtm, out_obj->buffer.pointer,
 	       sizeof(struct GTM_buffer));
 
-	DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%Zx\n",
+	DEBPRINT("_GTM info: ptr: 0x%p, len: 0x%x, exp.len: 0x%zx\n",
 		 out_obj->buffer.pointer, out_obj->buffer.length,
 		 sizeof(struct GTM_buffer));
 

drivers/ide/ide-tape.c

@@ -1136,7 +1136,7 @@ static ssize_t idetape_chrdev_read(struct file *file, char __user *buf,
 	ssize_t ret = 0;
 	int rc;
 
-	ide_debug_log(IDE_DBG_FUNC, "count %Zd", count);
+	ide_debug_log(IDE_DBG_FUNC, "count %zd", count);
 
 	if (tape->chrdev_dir != IDETAPE_DIR_READ) {
 		if (test_bit(ilog2(IDE_AFLAG_DETECT_BS), &drive->atapi_flags))
@@ -1195,7 +1195,7 @@ static ssize_t idetape_chrdev_write(struct file *file, const char __user *buf,
 	if (tape->write_prot)
 		return -EACCES;
 
-	ide_debug_log(IDE_DBG_FUNC, "count %Zd", count);
+	ide_debug_log(IDE_DBG_FUNC, "count %zd", count);
 
 	/* Initialize write operation */
 	rc = idetape_init_rw(drive, IDETAPE_DIR_WRITE);