e1000e: cleanup USLEEP_RANGE checkpatch checks

Resolve strict checkpatch USLEEP_RANGE checks by converting delays and
sleeps as described in ./Documentation/timers/timers-howto.txt.  Three
other violations of the text have also been fixed.

CHECK:USLEEP_RANGE: usleep_range is preferred over udelay; see
Documentation/timers/timers-howto.txt

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
diff --git a/drivers/net/ethernet/intel/e1000e/nvm.c b/drivers/net/ethernet/intel/e1000e/nvm.c
index 84fecc2..44ddc0a 100644
--- a/drivers/net/ethernet/intel/e1000e/nvm.c
+++ b/drivers/net/ethernet/intel/e1000e/nvm.c
@@ -630,7 +630,7 @@
 {
 	u32 ctrl_ext;
 
-	udelay(10);
+	usleep_range(10, 20);
 	ctrl_ext = er32(CTRL_EXT);
 	ctrl_ext |= E1000_CTRL_EXT_EE_RST;
 	ew32(CTRL_EXT, ctrl_ext);