FRV: Don't attempt to #include <linux/blk.h> as it doesn't exist

Stop the FRV arch from attempting to #include <linux/blk.h> as it doesn't
exist.
Reported-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/frv/kernel/setup.c

@@ -46,7 +46,6 @@
 #include <asm/io.h>
 
 #ifdef CONFIG_BLK_DEV_INITRD
-#include <linux/blk.h>
 #include <asm/pgtable.h>
 #endif