mtd: denali: fix warning when compiled for 64bit system

The 64-bit compiler (ex. aarch64) emits "warning: cast from pointer
to integer of different size".

Make it work with 64bit DMA address while I am here.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

drivers/mtd/nand/denali.c

@@ -741,7 +741,7 @@ static void denali_setup_dma(struct denali_nand_info *denali, int op)
 {
 	uint32_t mode;
 	const int page_count = 1;
-	uint32_t addr = (uint32_t)denali->buf.dma_buf;
+	uint64_t addr = (unsigned long)denali->buf.dma_buf;
 
 	flush_dcache_range(addr, addr + sizeof(denali->buf.dma_buf));
 
@@ -759,7 +759,7 @@ static void denali_setup_dma(struct denali_nand_info *denali, int op)
 	index_addr(denali, mode, addr);
 
 	/* 3. set memory high address bits 64:32 */
-	index_addr(denali, mode, 0);
+	index_addr(denali, mode, addr >> 32);
 #else
 	mode = MODE_10 | BANK(denali->flash_bank);
 
@@ -769,7 +769,7 @@ static void denali_setup_dma(struct denali_nand_info *denali, int op)
 	index_addr(denali, mode | denali->page, 0x2000 | op | page_count);
 
 	/* 2. set memory high address bits 23:8 */
-	index_addr(denali, mode | ((addr >> 16) << 8), 0x2200);
+	index_addr(denali, mode | (((addr >> 16) & 0xffff) << 8), 0x2200);
 
 	/* 3. set memory low address bits 23:8 */
 	index_addr(denali, mode | ((addr & 0xffff) << 8), 0x2300);