s390/qdio: remove QDIO_SBAL_SIZE macro

It's unused, and duplicates sizeof(struct qdio_buffer).
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/qdio.h

@@ -18,7 +18,6 @@
 #define QDIO_MAX_BUFFERS_MASK		(QDIO_MAX_BUFFERS_PER_Q - 1)
 #define QDIO_BUFNR(num)			((num) & QDIO_MAX_BUFFERS_MASK)
 #define QDIO_MAX_ELEMENTS_PER_BUFFER	16
-#define QDIO_SBAL_SIZE			256
 
 #define QDIO_QETH_QFMT			0
 #define QDIO_ZFCP_QFMT			1