feat(stpmic1): add USB OTG regulators

Add regulators boost, pwr_sw1 and pwr_sw2 regulators related to
USB OTG supply BOOST, SW_OTG and SWIN/SWOUT. These regulators are
needed since manipulated during the suspend/resume power sequence
as per FDT description for stm32mp15x-xxx boards from
STMicroelectronics.

Change-Id: I6217de707e49882bd5a9100db43e0d354908800d
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
diff --git a/include/drivers/st/stpmic1.h b/include/drivers/st/stpmic1.h
index eb104e4..a69e5b5 100644
--- a/include/drivers/st/stpmic1.h
+++ b/include/drivers/st/stpmic1.h
@@ -148,6 +148,7 @@
 #define OCP_LIMIT_HIGH			BIT(3)
 #define SWIN_SWOUT_ENABLED		BIT(2)
 #define USBSW_OTG_SWITCH_ENABLED	BIT(1)
+#define BOOST_ENABLED			BIT(0)
 
 int stpmic1_powerctrl_on(void);
 int stpmic1_switch_off(void);