habanalabs: Fix test build failures

allmodconfig builds on 32-bit architectures fail with the following error.

drivers/misc/habanalabs/common/memory.c: In function 'alloc_device_memory':
drivers/misc/habanalabs/common/memory.c:153:49: error:
	cast from pointer to integer of different size

Fix the typecast. While at it, drop other unnecessary typecasts associated
with the same commit.

Fixes: e8458e20

 ("habanalabs: make sure device mem alloc is page aligned")
Cc: Ohad Sharabi <osharabi@habana.ai>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220404134859.3278599-1-linux@roeck-us.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>