staging: octeon-usb: use __delay() instead of cvmx_wait()

Commit edf188bee1 ("MIPS: Octeon: Remove usage of cvmx_wait()
everywhere.") deleted cvmx_wait() but forgot to update OCTEON USB
staging driver. Fix that to allow driver build.

Fixes: edf188bee1 ("MIPS: Octeon: Remove usage of cvmx_wait() everywhere.")
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Reviewed-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon-usb/octeon-hcd.c

@@ -394,7 +394,7 @@ struct octeon_hcd {
 				result = -1;				    \
 				break;					    \
 			} else						    \
-				cvmx_wait(100);				    \
+				__delay(100);				    \
 		}							    \
 	} while (0);							    \
 	result; })
@@ -774,7 +774,7 @@ retry:
 	usbn_clk_ctl.s.hclk_rst = 1;
 	cvmx_write64_uint64(CVMX_USBNX_CLK_CTL(usb->index), usbn_clk_ctl.u64);
 	/* 2e.  Wait 64 core-clock cycles for HCLK to stabilize */
-	cvmx_wait(64);
+	__delay(64);
 	/*
 	 * 3. Program the power-on reset field in the USBN clock-control
 	 *    register:
@@ -795,7 +795,7 @@ retry:
 	cvmx_write64_uint64(CVMX_USBNX_USBP_CTL_STATUS(usb->index),
 			    usbn_usbp_ctl_status.u64);
 	/* 6. Wait 10 cycles */
-	cvmx_wait(10);
+	__delay(10);
 	/*
 	 * 7. Clear ATE_RESET field in the USBN clock-control register:
 	 *    USBN_USBP_CTL_STATUS[ATE_RESET] = 0