staging: r8188eu: convert DBG_88E calls in core/rtw_sta_mgt.c

Convert the DBG_88E macro calls in core/rtw_sta_mgt.c to use pr_debug,
as their information may be useful to observers, and this gets the
driver closer to the point of being able to remove DBG_88E itself.

These calls are at points in the call chain where use of dev_dbg or
netdev_dbg isn't possible due to lack of device pointer, so plain
pr_debug is appropriate here.
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20220110090020.6800-8-phil@philpotter.co.ukSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/r8188eu/core/rtw_sta_mgt.c

@@ -104,7 +104,7 @@ inline int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta)
 	int offset = (((u8 *)sta) - stapriv->pstainfo_buf) / sizeof(struct sta_info);
 
 	if (!stainfo_offset_valid(offset))
-		DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
+		pr_debug("invalid offset(%d), out of range!!!", offset);
 
 	return offset;
 }
@@ -112,7 +112,7 @@ inline int rtw_stainfo_offset(struct sta_priv *stapriv, struct sta_info *sta)
 inline struct sta_info *rtw_get_stainfo_by_offset(struct sta_priv *stapriv, int offset)
 {
 	if (!stainfo_offset_valid(offset))
-		DBG_88E("%s invalid offset(%d), out of range!!!", __func__, offset);
+		pr_debug("invalid offset(%d), out of range!!!", offset);
 
 	return (struct sta_info *)(stapriv->pstainfo_buf + offset * sizeof(struct sta_info));
 }