qlxge: Inline the one use of a variable only used in a debug trace.

The other QL_DPRINT*() invocations in qls_init_hw_if() all used the
expanded form instead of the local variable. The module build always
defines QL_DBG in CFLAGS so doesn't trip over this, but adding qlxge
to a kernel config builds without QL_DBG.

Reported by: olivier