mfd: stm32-timers: Drop unused TIM_DIER_CC_IE

This macro is misleading as

	TIM_DIER_CC_IE(1) == TIM_DIER_CC2IE

. The only user was updated to use TIM_DIER_CCxIE() instead which
doesn't suffer from this mismatch, so TIM_DIER_CC_IE can be dropped.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Link: https://lore.kernel.org/r/6c8fcc4ed159992a1dbb0796087e6ceb10c39c96.1718791090.git.u.kleine-koenig@baylibre.comSigned-off-by: Lee Jones <lee@kernel.org>

include/linux/mfd/stm32-timers.h

@@ -47,7 +47,6 @@
 #define TIM_DIER_CC2IE		TIM_DIER_CCxIE(2)			/* CC2 Interrupt Enable				*/
 #define TIM_DIER_CC3IE		TIM_DIER_CCxIE(3)			/* CC3 Interrupt Enable				*/
 #define TIM_DIER_CC4IE		TIM_DIER_CCxIE(4)			/* CC4 Interrupt Enable				*/
-#define TIM_DIER_CC_IE(x)	BIT((x) + 1)				/* CC1, CC2, CC3, CC4 interrupt enable		*/
 #define TIM_DIER_UDE		BIT(8)					/* Update DMA request Enable			*/
 #define TIM_DIER_CCxDE(x)	BIT(9 + ((x) - 1))			/* CCx DMA request Enable (x ∈ {1, .. 4})	*/
 #define TIM_DIER_CC1DE		TIM_DIER_CCxDE(1)			/* CC1 DMA request Enable			*/