soc: intel_adsp: remove IDC dt default for CONFIG_INTEL_ADSP_IPC

The SoC specific IPC driver is for host IPC, and not IDC (which
is between CPUs). So there is no need to use the IDC devicetree
binding to enable the kconfig.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

Author: dcpleung

soc/intel/intel_adsp/Kconfig

@@ -33,12 +33,10 @@ config INTEL_ADSP_SIM_NO_SECONDARY_CORE_FLOW
 endif # INTEL_ADSP_SIM
 
 DT_COMPAT_INTEL_ADSP_HOST_IPC := intel,adsp-host-ipc
-DT_COMPAT_INTEL_ADSP_IDC := intel,adsp-idc
 
 config INTEL_ADSP_IPC
 	bool "Driver for the host IPC interrupt delivery"
 	default $(dt_compat_enabled,$(DT_COMPAT_INTEL_ADSP_HOST_IPC)) if !SOF
-	default $(dt_compat_enabled,$(DT_COMPAT_INTEL_ADSP_IDC)) if !SOF
 	help
 	  Driver for the host IPC interrupt delivery mechanism.
 	  Currently SOF has its own driver for this hardware.