ENGR00271577 sdma: fix the compiling warning

ENGR00271577 sdma: fix the compiling warning

In the imx6sl, we meet the compiling warning shows below:
--------------------------------------------------------------------
drivers/dma/imx-sdma.c: In function Pleasesdma_iram_free:
drivers/dma/imx-sdma.c:366: warning: passing argument 2 of
		Pleasegen_pool_free makes integer from pointer without a cast
include/linux/genalloc.h:58: note: expected Pleaselong unsigned integer
		but argument is of type Pleaselong unsigned int *Please
drivers/dma/imx-sdma.c: In function Pleasesdma_load_script:
drivers/dma/imx-sdma.c:452: warning: passing argument 2 of
		Pleasesdma_iram_malloc makes pointer from integer without a cast
drivers/dma/imx-sdma.c:352: note: expected Pleaselong unsigned
		int *Please but argument is of type Pleaselong unsigned integer
drivers/dma/imx-sdma.c:475: warning: passing argument 1 of
		Pleasesdma_iram_free makes pointer from integer without a cast
drivers/dma/imx-sdma.c:361: note: expected Pleaselong unsigned
		int *Please but argument is of type Pleasedma_addr_t
drivers/dma/imx-sdma.c: In function Pleasesdma_request_channel:
drivers/dma/imx-sdma.c:942: warning: passing argument 2 of
		Pleasesdma_iram_malloc makes pointer from integer without a cast
drivers/dma/imx-sdma.c:352: note: expected Pleaselong unsigned int
		*Please but argument is of type Pleaselong unsigned integer
drivers/dma/imx-sdma.c: In function Pleasesdma_free_chan_resources:
drivers/dma/imx-sdma.c:1109: warning: passing argument 1 of
		Pleasesdma_iram_free makes pointer from integer without a cast
drivers/dma/imx-sdma.c:361: note: expected Pleaselong unsigned int
		*Please but argument is of type Pleasedma_addr_t
drivers/dma/imx-sdma.c: In function Pleasesdma_init:
drivers/dma/imx-sdma.c:1505: warning: passing argument 2 of
		Pleasesdma_iram_malloc from incompatible pointer type
drivers/dma/imx-sdma.c:352: note: expected Pleaselong unsigned int
		*Please but argument is of type Pleasedma_addr_t *Please
--------------------------------------------------------------------

this patch fixes it.

Signed-off-by: Huang Shijie <b32955@freescale.com>