mfd: stm32: Add defines to be used for clkevent purpose

Add defines to be able to enable/clear irq and configure one shot mode.

Signed-off-by: Benjamin Gaignard <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

include/linux/mfd/stm32-lptimer.h

···
 #define STM32_LPTIM_CMPOK		BIT(3)
 
 /* STM32_LPTIM_ICR - bit fields */
+#define STM32_LPTIM_ARRMCF		BIT(1)
 #define STM32_LPTIM_CMPOKCF_ARROKCF	GENMASK(4, 3)
+
+/* STM32_LPTIM_IER - bit flieds */
+#define STM32_LPTIM_ARRMIE	BIT(1)
 
 /* STM32_LPTIM_CR - bit fields */
 #define STM32_LPTIM_CNTSTRT	BIT(2)
+#define STM32_LPTIM_SNGSTRT	BIT(1)
 #define STM32_LPTIM_ENABLE	BIT(0)
 
 /* STM32_LPTIM_CFGR - bit fields */