usb: ehci-ci: Add missing registers.

Some registers of usb_ehci were marked as reserved.
This may be true for some variants of Chipidea USB core, but they have
meaning on other devices.

The following registers were added:
sbusstatus/sbusmode: AHB-related registers
genconfig*: Auxiluary IP core configuration registers.

Signed-off-by: Mateusz Kulikowski <mateusz.kulikowski@gmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Tested-by: Simon Glass <sjg@chromium.org>

include/usb/ehci-ci.h

@@ -191,7 +191,11 @@ struct usb_ehci {
 	u32     gptimer1_ld;	/* 0x088 - General Purpose Timer 1 load value */
 	u32     gptimer1_ctrl;	/* 0x08C - General Purpose Timer 1 control */
 	u32	sbuscfg;	/* 0x090 - System Bus Interface Control */
-	u8	res2[0x6C];
+	u32	sbusstatus;	/* 0x094 - System Bus Interface Status */
+	u32	sbusmode;	/* 0x098 - System Bus Interface Mode */
+	u32	genconfig;	/* 0x09C - USB Core Configuration */
+	u32	genconfig2;	/* 0x0A0 - USB Core Configuration 2 */
+	u8	res2[0x5c];
 	u8	caplength;	/* 0x100 - Capability Register Length */
 	u8	res3[0x1];
 	u16	hciversion;	/* 0x102 - Host Interface Version */