staging: rtlwifi: rtl8822be: Use __func__ instead of hardcoded name

Switch hardcoded function name with a reference to __func__ making
the code more maintenable and addressing the checkpatch warning:

WARNING: Prefer using '"%s...", __func__' to using 'rtl8822be_sc_mapping', this function's name, in a string
+                                       "rtl8822be_sc_mapping: Not Correct Primary40MHz Setting\n");

Credits to checkpatch.
Signed-off-by: Frank A. Cancio Bello <frank@generalsoftwareinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtlwifi/rtl8822be/trx.c

@@ -571,9 +571,9 @@ static u8 rtl8822be_sc_mapping(struct ieee80211_hw *hw,
 				sc_setting_of_desc =
 					VHT_DATA_SC_20_UPPERST_OF_80MHZ;
 			else
-				RT_TRACE(
-					rtlpriv, COMP_SEND, DBG_LOUD,
-					"rtl8822be_sc_mapping: Not Correct Primary40MHz Setting\n");
+				RT_TRACE(rtlpriv, COMP_SEND, DBG_LOUD,
+					 "%s: Not Correct Primary40MHz Setting\n",
+					 __func__);
 		}
 	} else if (rtlphy->current_chan_bw == HT_CHANNEL_WIDTH_20_40) {
 		if (ptcb_desc->packet_bw == HT_CHANNEL_WIDTH_20_40) {