greybus: arche-apb-ctrl: Remove extra delay in APB reset

With synchronization between SVC <=> AP over wake/detect line to
bring APB's out of reset, we do not need any extra delays now.
So remove it.

Testing Done: Tested for 10 iterations on EVT1
Signed-off-by: Vaibhav Hiremath <vaibhav.hiremath@linaro.org>
Reviewed-by: Michael Scott <michael.scott@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/arche-apb-ctrl.c

@@ -54,7 +54,6 @@ struct arche_apb_ctrl_drvdata {
 static inline void deassert_reset(unsigned int gpio)
 {
 	gpio_set_value(gpio, 1);
-	msleep(500);
 }
 
 static inline void assert_reset(unsigned int gpio)