staging: xgifb: Initialize Part0Port

It was left uninitialized, likely overseen, in this commit:
56810a92 ("staging: xgifb: use XGIRegInit()
Avoid copy-paste and use XGIRegInit() to initialize registers addresses.")
Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/xgifb/XGI_main_26.c

@@ -218,6 +218,7 @@ void XGIRegInit(struct vb_device_info *XGI_Pr, unsigned long BaseAddr)
 	XGI_Pr->P3c8 = BaseAddr + 0x18;
 	XGI_Pr->P3c9 = BaseAddr + 0x19;
 	XGI_Pr->P3da = BaseAddr + 0x2A;
+	XGI_Pr->Part0Port = BaseAddr + XGI_CRT2_PORT_00;
 	/* Digital video interface registers (LCD) */
 	XGI_Pr->Part1Port = BaseAddr + SIS_CRT2_PORT_04;
 	/* 301 TV Encoder registers */