[PATCH 4.19 0/5] Add support needed for Renesas USB 3.0 controller

Add support needed for the Renesas USB 3.0 controller (PD720201/PD720202). Without these patches a system with this USB controller will crash during boot.

This patch series backports the following upstream patches:

01: da83a722959a82733c3ca60030cc364ca2318c5a lib/genalloc: add gen_pool_dma_zalloc() for zeroed DMA allocations

02: b0310c2f09bbe8aebefb97ed67949a3a7092aca6 USB: use genalloc for USB HCs with local memory

03: 2d7a3dc3e24f43504b1f25eae8195e600f4cce8b USB: drop HCD_LOCAL_MEM flag

04: dd3ecf17ba70a70d2c9ef9ba725281b84f8eef12 usb: don't create dma pools for HCDs with a localmem_pool

05: edfbcb321faf07ca970e4191abe061deeb7d3788 usb: add a hcd_uses_dma helper

Signed-off-by: John L. Villalovos jlvillal@os.amperecomputing.com