Merge branch 'ethernet-fixes-for-stmmac-driver'

Joakim Zhang says:

====================
ethernet: fixes for stmmac driver

Fixes for stmmac driver.
---
ChangeLogs:
V1->V2:
	* subject prefix: ethernet: stmmac: -> net: stmmac:
	* use dma_addr_t instead of unsigned int for physical address
	* use cpu_to_le32()
V2->V3:
	* fix the build issue pointed out by kbuild bot.
	* add error handling for stmmac_reinit_rx_buffers() function.
V3->V4:
	* remove patch (net: stmmac: remove redundant null check for ptp clock),
	  reviewer thinks it should target net-next.
V4->V5:
	* use %pad format to print dma_addr_t.
	* extend dwmac4_display_ring() to support all descriptor types.
	* while() -> do-while()
====================

Link: https://lore.kernel.org/r/20210225090114.17562-1-qiangqing.zhang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>