smc91x: improve definition of debug macros

Redefine some macros that were conditioned upon SMC_DEBUG level.

By allowing compiler to verify parameters used by these macros
unconditionally, we can flag compilation failures.

Compiler will still optimize out the unused code path depending on
SMC_DEBUG, so this is a net gain.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>