tests/kernel/context: Correct dependency

An ifdef should have been also checking for native_sim,
let's correct it.

Note: By now native_sim builds with "native_posix compatibility mode"
enabled, which sets BOARD_NATIVE_POSIX to avoid breaking all this kind
of dependencies. But that will stop soon.
So let's fix the dependencies.

Signed-off-by: Alberto Escolar Piedras <[email protected]>

Author: aescolar

tests/kernel/context/src/main.c

@@ -57,7 +57,7 @@
 #elif defined(CONFIG_SPARC)
 #elif defined(CONFIG_MIPS)
 #elif defined(CONFIG_ARCH_POSIX)
-#if  defined(CONFIG_BOARD_NATIVE_POSIX)
+#if defined(CONFIG_BOARD_NATIVE_POSIX) || defined(CONFIG_BOARD_NATIVE_SIM)
 #define TICK_IRQ TIMER_TICK_IRQ
 #else
 /*