USB: musb: fix init oops crash with static FIFO config

Correct musb_read_fifosize() and musb_configure_ep0() functions
for the #ifndef BLACKFIN branch when the silicon uses static FIFO
configuration.  (Most current silicon configures this controller
to use dynamic FIFO configuration; some parts from ST don't, like
the STM STA2062.)
Signed-off-by: NGiuseppe	GORGOGLIONE <giuseppe.gorgoglione@st.com>
Signed-off-by: NFelipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

drivers/usb/musb/musb_core.h

@@ -478,10 +478,11 @@ static inline void musb_configure_ep0(struct musb *musb)
 static inline int musb_read_fifosize(struct musb *musb,
 		struct musb_hw_ep *hw_ep, u8 epnum)
 {
+	void *mbase = musb->mregs;
 	u8 reg = 0;
 
 	/* read from core using indexed model */
-	reg = musb_readb(hw_ep->regs, 0x10 + MUSB_FIFOSIZE);
+	reg = musb_readb(mbase, MUSB_EP_OFFSET(epnum, MUSB_FIFOSIZE));
 	/* 0's returned when no more endpoints */
 	if (!reg)
 		return -ENODEV;
@@ -508,6 +509,7 @@ static inline void musb_configure_ep0(struct musb *musb)
 {
 	musb->endpoints[0].max_packet_sz_tx = MUSB_EP0_FIFOSIZE;
 	musb->endpoints[0].max_packet_sz_rx = MUSB_EP0_FIFOSIZE;
+	musb->endpoints[0].is_shared_fifo = true;
 }
 #endif /* CONFIG_BLACKFIN */