Fix uart_mini initialization and emulation

kernel/core/irq.c

@@ -67,5 +67,5 @@ k_irq_fallback(int type, unsigned long esr, unsigned long address)
 	k_logu(esr, 16);
 	k_logs(", address: ");
 	k_logu(address, 16);
-	k_logs("\n");
+	k_logs("\r\n");
 }

kernel/core/main.c

@@ -31,7 +31,7 @@ k_main(void)
 
 	k_logs("Starting Lowe OS (EL");
 	k_logi(aarch64_get_el(), 10);
-	k_logs(")\n");
+	k_logs(")\r\n");
 
 	if (k_arch_init())
 		goto panic;

kernel/core/timer.c

@@ -35,5 +35,7 @@ k_timer_irq_handler(void)
 	m_current += m_interval;
 	aarch64_set32r(TIMER_C1, m_current);
 	aarch64_set32r(TIMER_CS, TIMER_CS_M1);
-	k_logs("Timer interrupt\n");
+	k_logs("Timer: ");
+	k_logu(m_current, 10);
+	k_logs("\r\n");
 }