habanalabs: get lower/upper 32 bits via masking

fix multiple similar occurrences of the following sparse warning:
'warning: cast truncates bits from constant value
(7ffc113000 becomes fc113000)'

Signed-off-by: Koby Elbaz <kelbaz@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>