staging: r8822be: check kzalloc return or bail

The kzalloc() in halmac_parse_psd_data_88xx() can fail and return NULL
so check the psd_set->data after allocation and if allocation failed
return HALMAC_CMD_PROCESS_ERROR.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 938a0447

 ("staging: r8822be: Add code for halmac sub-drive")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>