clk: stm32mp21: remove CCB register

CCB peripheral is no more supported.

Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Change-Id: I834df210111308f3e8a42225a791476861230483
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/u-boot/+/441740
ACI: CITOOLS <MDG-smet-aci-reviews@list.st.com>
ACI: CIBUILD <MDG-smet-aci-builds@list.st.com>
Domain-Review: Patrick DELAUNAY <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice CHOTARD <patrice.chotard@foss.st.com>

Author: Gabriel-Fernandz

include/stm32mp21_rcc.h

@@ -393,7 +393,6 @@
 #define RCC_HASH2CFGR				0x884
 #define RCC_CRYP1CFGR				0x888
 #define RCC_CRYP2CFGR				0x88C
-#define RCC_CCBCFGR				0x890
 #define RCC_IWDG1CFGR				0x894
 #define RCC_IWDG2CFGR				0x898
 #define RCC_IWDG3CFGR				0x89C