power: regulator: stpmu1: add power off delay

This patch adds a delay when regulators are disabled.
This delay is set to 5 ms to cover all use cases.
The worst use case actually seen is during a SD card power cycle.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/include/power/stpmu1.h b/include/power/stpmu1.h
index 61c58f3..5906fbf 100644
--- a/include/power/stpmu1.h
+++ b/include/power/stpmu1.h
@@ -44,6 +44,7 @@
 #define STPMU1_NVM_USER_STATUS_ERROR	BIT(1)
 
 #define STPMU1_DEFAULT_START_UP_DELAY_MS	1
+#define STPMU1_DEFAULT_STOP_DELAY_MS		5
 #define STPMU1_USB_BOOST_START_UP_DELAY_MS	10
 
 enum {