UPSTREAM: usb: host: xhci-omap: Remove redundant board_usb_init and board_usb_cleanup functions

board_usb_init()/_cleanup() should be in board files and don't have
a place in the xhci-omap driver. W

UPSTREAM: usb: host: xhci-omap: Remove redundant board_usb_init and board_usb_cleanup functions

board_usb_init()/_cleanup() should be in board files and don't have
a place in the xhci-omap driver. Weak versions for
board_usb_init()/_cleanup() already exist in common/usb.c
(for host mode) and drivers/usb/gadget/g_dnl.c (for gadget mode).

Therefore, remove init and cleanup functions from xhci-omap and
implement them in the board files.

Change-Id: I9d1fbcbf31fe63f86a5d0a38d767b7070ecfa1fb
Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Frank Wang <frank.wang@rock-chips.com>
(cherry picked from commit b16c129c2290d26e7b16b4309713c78f6146bc8a)

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env: Rename getenv/_f() to env_get()

We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few place

env: Rename getenv/_f() to env_get()

We are now using an env_ prefix for environment functions. Rename these
two functions for consistency. Also add function comments in common.h.

Quite a few places use getenv() in a condition context, provoking a
warning from checkpatch. These are fixed up in this patch also.

Suggested-by: Wolfgang Denk <wd@denx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>

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