net/ena/base: convert values to 32-bit before shifting

net/ena/base: convert values to 32-bit before shifting

When filling out meta descriptor, all values should be converted to the
desired type (u32 in case of the meta descriptor) to prevent losing the
data.

For example, io_sq->phase is of type u8. If
ENA_ETH_IO_TX_META_DESC_PHASE_SHIFT would be greater then 8, all data
would be lost.

Signed-off-by: Michal Krawczyk <mk@semihalf.com>
Reviewed-by: Igor Chauskin <igorch@amazon.com>
Reviewed-by: Guy Tzalik <gtzalik@amazon.com>
Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>