CLK: ARC: HSDK: add separate clock map for HSDK-4xD

HSDK and HSDK-4xD clock trees are slightly different.
commit 1dfb2ec0d7fb ("ARC: HSDK: CGU: add support for timer clock")
introduce regression for HSDK board cause crash when setting
tunnel clock. Fix that.

Fixes: 1dfb2ec0d7fb ("ARC: HSDK: CGU: add support for timer clock")
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index 1992d4a..8b8b719 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -100,10 +100,11 @@
 	  managed by the TI System Controller, say Y here. Otherwise, say N.
 
 config CLK_HSDK
-	bool "Enable cgu clock driver for HSDK"
-	depends on CLK
+	bool "Enable cgu clock driver for HSDK boards"
+	depends on CLK && TARGET_HSDK
 	help
-	  Enable this to support the cgu clocks on Synopsys ARC HSDK
+	  Enable this to support the cgu clocks on Synopsys ARC HSDK and
+	  Synopsys ARC HSDK-4xD boards
 
 config CLK_VERSAL
 	bool "Enable clock driver support for Versal"