[U-Boot] spi: mxc_spi: Fix build warning on ARM64 platforms

[sbabic at denx.de]

> When building mxc_spi driver on ARM64 platforms, get below build warnings.
> Fix it in this patch.
> In file included from include/common.h:48:0,
>  from drivers/spi/mxc_spi.c:9:
>  drivers/spi/mxc_spi.c: In function ‘spi_xchg_single’:
> drivers/spi/mxc_spi.c:232:21: warning: cast from pointer to integer of
> different size [-Wpointer-to-int-cast]
>  _func_, bitlen, (u32)dout, (u32)din);
>  ^
>  include/log.h:135:26: note: in definition of macro ‘debug_cond’
> printf(pr_fmt(fmt), ##args); \
>  ^~~~
>  drivers/spi/mxc_spi.c:231:2: note: in expansion of macro ‘debug’
> debug("%s: bitlen %d dout 0x%x din 0x%x\n",
>  ^~~~~
>  drivers/spi/mxc_spi.c:232:32: warning: cast from pointer to integer of
> different size [-Wpointer-to-int-cast]
>  _func_, bitlen, (u32)dout, (u32)din);
>  ^
>  include/log.h:135:26: note: in definition of macro ‘debug_cond’
> printf(pr_fmt(fmt), ##args); \
>  ^~~~
>  drivers/spi/mxc_spi.c:231:2: note: in expansion of macro ‘debug’
> debug("%s: bitlen %d dout 0x%x din 0x%x\n",
>  ^~~~~
> Signed-off-by: Ye Li <ye.li at nxp.com>
> Reviewed-by: Peng Fan <peng.fan at nxp.com>

Applied to u-boot-imx, master, thanks !

Best regards,
Stefano Babic

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