staging: qlge: Remove unnecessary parentheses around references

This patch fixes checkpatch.pl warning:

CHECK: Unnecessary parentheses around mpi_coredump->mpi_global_header

Signed-off-by: Nishal Kulkarni <nishalkulkarni@gmail.com>
Link: https://lore.kernel.org/r/YNcPzWXkKkmip95x@nishal-pc


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>