misc: rtsx: rename SG_END macro

A change to the generic scatterlist code caused a conflict with
the rtsx card reader driver:

In file included from drivers/misc/cardreader/rtsx_pcr.c:32:
include/linux/rtsx_pci.h:40: error: "SG_END" redefined [-Werror]

This changes one instance of the driver to prefix SG_END and
related constants.

Fixes: 723fbf563a6a ("lib/scatterlist: Add SG_CHAIN and SG_END macros for LSB encodings")
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/misc/cardreader/rtsx_pcr.c

@@ -444,12 +444,12 @@ static void rtsx_pci_add_sg_tbl(struct rtsx_pcr *pcr,
 {
 	u64 *ptr = (u64 *)(pcr->host_sg_tbl_ptr) + pcr->sgi;
 	u64 val;
-	u8 option = SG_VALID | SG_TRANS_DATA;
+	u8 option = RTSX_SG_VALID | RTSX_SG_TRANS_DATA;
 
 	pcr_dbg(pcr, "DMA addr: 0x%x, Len: 0x%x\n", (unsigned int)addr, len);
 
 	if (end)
-		option |= SG_END;
+		option |= RTSX_SG_END;
 	val = ((u64)addr << 32) | ((u64)len << 12) | option;
 
 	put_unaligned_le64(val, ptr);

include/linux/rtsx_pci.h

@@ -36,12 +36,12 @@
 #define   CHECK_REG_CMD			2
 
 #define RTSX_HDBAR			0x08
-#define   SG_INT			0x04
-#define   SG_END			0x02
-#define   SG_VALID			0x01
-#define   SG_NO_OP			0x00
-#define   SG_TRANS_DATA			(0x02 << 4)
-#define   SG_LINK_DESC			(0x03 << 4)
+#define   RTSX_SG_INT			0x04
+#define   RTSX_SG_END			0x02
+#define   RTSX_SG_VALID			0x01
+#define   RTSX_SG_NO_OP			0x00
+#define   RTSX_SG_TRANS_DATA		(0x02 << 4)
+#define   RTSX_SG_LINK_DESC		(0x03 << 4)
 #define RTSX_HDBCTLR			0x0C
 #define   SDMA_MODE			0x00
 #define   ADMA_MODE			(0x02 << 26)