rtlwifi: Replace RT_TRACE with rtl_dbg

rtlwifi: Replace RT_TRACE with rtl_dbg

[ Upstream commit 33a1769756514c6c852ebcd8d046452dc9a2ac60 ]

The macro name RT_TRACE makes it seem that it is used for tracing, when
is actually used for debugging. Change the name to rtl_dbg. Any Sparse
errors exposed by this change were also fixed.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200723204244.24457-3-Larry.Finger@lwfinger.net
Stable-dep-of: 905a9241e4e8 ("wifi: rtlwifi: fix incorrect error codes in rtl_debugfs_set_write_rfreg()")
Signed-off-by: Sasha Levin <sashal@kernel.org>