arm: stm32mp: add Rev.B support for STM32MP25

Add chip revision B support for STM32MP25, for displaying it in trace.

Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
diff --git a/arch/arm/mach-stm32mp/stm32mp2/stm32mp25x.c b/arch/arm/mach-stm32mp/stm32mp2/stm32mp25x.c
index 4b2f70a..7f896a0 100644
--- a/arch/arm/mach-stm32mp/stm32mp2/stm32mp25x.c
+++ b/arch/arm/mach-stm32mp/stm32mp2/stm32mp25x.c
@@ -167,6 +167,9 @@
 		case CPU_REV1:
 			cpu_r = "A";
 			break;
+		case CPU_REV2:
+			cpu_r = "B";
+			break;
 		default:
 			break;
 		}