USB: musb: fix __iomem in trace functions

USB: musb: fix __iomem in trace functions

The trace functions should have __iomem on the addr
pointers. Add __iomem to avoid the following warnings
from sparse:

drivers/usb/musb/musb_core.c:253:55: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:253:55:    expected void const *addr
drivers/usb/musb/musb_core.c:253:55:    got void const [noderef] <asn:2> *addr
drivers/usb/musb/musb_core.c:259:56: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:259:56:    expected void const *addr
drivers/usb/musb/musb_core.c:259:56:    got void [noderef] <asn:2> *addr
drivers/usb/musb/musb_core.c:267:55: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:267:55:    expected void const *addr
drivers/usb/musb/musb_core.c:267:55:    got void const [noderef] <asn:2> *addr
drivers/usb/musb/musb_core.c:273:56: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:273:56:    expected void const *addr
drivers/usb/musb/musb_core.c:273:56:    got void [noderef] <asn:2> *addr
drivers/usb/musb/musb_core.c:383:55: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:383:55:    expected void const *addr
drivers/usb/musb/musb_core.c:383:55:    got void const [noderef] <asn:2> *addr
drivers/usb/musb/musb_core.c:390:56: warning: incorrect type in argument 2 (different address spaces)
drivers/usb/musb/musb_core.c:390:56:    expected void const *addr
drivers/usb/musb/musb_core.c:390:56:    got void [noderef] <asn:2> *addr

Signed-off-by: Ben Dooks (Codethink) <ben.dooks@codethink.co.uk>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200115132547.364-18-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>