zephyr: idc: Name IDC p4wq threads

Name IDC p4wq threads. Unfortunately the idc threads only get their
names after they are needed for the first time. Until that time they
appear as unnamed (a hex number) threads on core 0.

There is also one funny thing. There is static thread reserved for
core 0, but that is never activated, and it remains there as a hex
number forever.

However, in this simple and risk free convenience fix, I do not dare
to touch that. Maybe later.

Signed-off-by: Jyri Sarha <jyri.sarha@linux.intel.com>

Author: Jyri Sarha

src/idc/zephyr_idc.c

@@ -198,10 +198,14 @@ int idc_send_msg(struct idc_msg *msg, uint32_t mode)
 
 void idc_init_thread(void)
 {
+	char thread_name[] = "idc_p4wq0";
 	int cpu = cpu_get_id();
 
 	k_p4wq_enable_static_thread(q_zephyr_idc + cpu,
 				    _p4threads_q_zephyr_idc + cpu, BIT(cpu));
+
+	thread_name[sizeof(thread_name) - 2] = '0' + cpu;
+	k_thread_name_set(_p4threads_q_zephyr_idc + cpu, thread_name);
 	/*
 	 * Assign SOF system heap to the IDC thread. Otherwise by default it
 	 * uses the Zephyr heap for DP stack allocation