pcm052: add new BK4r1 target based on PCM052 SoM

Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index f55d5b2..2d3303b 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -595,6 +595,10 @@
 	bool "Support pcm-052"
 	select CPU_V7
 
+config TARGET_BK4R1
+	bool "Support BK4r1"
+	select CPU_V7
+
 config ARCH_ZYNQ
 	bool "Xilinx Zynq Platform"
 	select CPU_V7