Any multiplication between GENMASK(31, 0) and a number bigger than 1
will be truncated because of the overflow, if the size of unsigned long
is 32 bits.

Replaced GENMASK with GENMASK_ULL to make sure that multiplication will
be between 64 bits values.

Cc: <stable@vger.kernel.org> # 5.15+
Fixes: 514def5d ("phy: nxp-c45-tja11xx: add timestamping support")
Signed-off-by: Radu Pirea (OSS) <radu-nicolae.pirea@oss.nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20230406095953.75622-1-radu-nicolae.pirea@oss.nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>