ionic: Don't check null when calling vfree()

ionic: Don't check null when calling vfree()

vfree() checks for null internally, so there's no need to
check in the caller. So, always vfree() on variables
allocated with valloc(). If the variables are never
alloc'd vfree() is still safe.

Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Link: https://lore.kernel.org/r/20231204210936.16587-4-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>