USB: musb: tusb6010: fix compile error with n8x0_defconfig

Drop the unnecessary empty stubs in tusb6010.c and avoid
a compile error when building kernel for n8x0.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/usb/musb/tusb6010.c b/drivers/usb/musb/tusb6010.c
index 05c077f..3c48e77 100644
--- a/drivers/usb/musb/tusb6010.c
+++ b/drivers/usb/musb/tusb6010.c
@@ -29,19 +29,6 @@
 #define TUSB_REV_MAJOR(reg_val)		((reg_val >> 4) & 0xf)
 #define TUSB_REV_MINOR(reg_val)		(reg_val & 0xf)
 
-#ifdef CONFIG_PM
-/* REVISIT: These should be only needed if somebody implements off idle */
-void musb_platform_save_context(struct musb *musb,
-			struct musb_context_registers *musb_context)
-{
-}
-
-void musb_platform_restore_context(struct musb *musb,
-			struct musb_context_registers *musb_context)
-{
-}
-#endif
-
 /*
  * Checks the revision. We need to use the DMA register as 3.0 does not
  * have correct versions for TUSB_PRCM_REV or TUSB_INT_CTRL_REV.