staging: rtl8192e: adjust size of trsw_gain_X for new RF90_PATH_MAX

The array trsw_gain_X in struct phy_sts_ofdm_819xpci is always accessed by
indices in the range i = 0; i < RF90_PATH_MAX. A previous patch changed the
value of RF90_PATH_MAX from 4 to 2, so we can reduce the size of
trsw_gain_X to 2. Use RF90_PATH_MAX instead of a hard-coded size.
Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20240831100809.29173-4-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtl8192e/r8190P_def.h

@@ -8,6 +8,7 @@
 #define R8190P_DEF_H
 
 #include <linux/types.h>
+#include "r8192E_phy.h"
 
 #define		MAX_SILENT_RESET_RX_SLOT_NUM	10
 
@@ -137,7 +138,7 @@ struct tx_fwinfo_8190pci {
 };
 
 struct phy_sts_ofdm_819xpci {
-	u8	trsw_gain_X[4];
+	u8	trsw_gain_X[RF90_PATH_MAX];
 	u8	pwdb_all;
 	u8	cfosho_X[4];
 	u8	cfotail_X[4];