MLK-16931 imx8m: hab: Fix secure boot build warning

MLK-16931 imx8m: hab: Fix secure boot build warning

Found HAB build warnings on mScale, those relate to ARM 64 bits conversion.

arch/arm/imx-common/hab.c: In function ‘csf_is_valid’:
arch/arm/imx-common/hab.c:556:18: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
!chk_bounds((const uint8_t *)ivt_initial->csf,
^
In file included from arch/arm/imx-common/hab.c:14:0:
arch/arm/imx-common/hab.c:557:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
HAB_HDR_LEN(*(const struct hab_hdr *)ivt_initial->csf),
^
./arch/arm/include/asm/imx-common/hab.h:177:40: note: in definition of macro ‘HAB_HDR_LEN’
((size_t)(((const struct hab_hdr *)&(hdr))->len[0] << 8) \
^~~
arch/arm/imx-common/hab.c:557:17: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
HAB_HDR_LEN(*(const struct hab_hdr *)ivt_initial->csf),
^
./arch/arm/include/asm/imx-common/hab.h:178:41: note: in definition of macro ‘HAB_HDR_LEN’
+ (size_t)((const struct hab_hdr *)&(hdr))->len[1])
^~~
arch/arm/imx-common/hab.c:563:12: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
csf_hdr = (const uint8_t *)ivt_initial->csf;

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>