USB: dwc3: Fix compilation error to support LPAE

Targets having Large physical address extension support
enabled (CONFIG_ARM_LPAE) phys_addr_t and dma_addr_t
become 64-bit type(u64). Driver needs to use %pa when
printing physical address where physical address is passed
by reference.

Also, change coherent dma mask from 32 to 64 bit otherwise
dma_alloc_coherent failes due to smaller dma mask used than
system GFP_DMA mask when LPAE is enabled.

Change-Id: I648d16db4734e052318fe6003cee4690c27a6969
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>