llext: use EXPORT_SYMBOL() universally

Replace LL_EXTENSION_SYMBOL() with EXPORT_SYMBOL() in all tests and
samples.

Signed-off-by: Guennadi Liakhovetski <[email protected]>

Author: lyakh

samples/subsys/llext/edk/ext1/src/main.c

@@ -31,4 +31,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/ext2/src/main.c

@@ -23,4 +23,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/ext3/src/main.c

@@ -62,4 +62,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/edk/k-ext1/src/main.c

@@ -61,4 +61,4 @@ int start(void)
 
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

samples/subsys/llext/modules/src/hello_world_ext.c

@@ -24,4 +24,4 @@ void hello_world(void)
 	printk("Hello, world, from an llext!\n");
 #endif
 }
-LL_EXTENSION_SYMBOL(hello_world);
+EXPORT_SYMBOL(hello_world);

tests/misc/llext-edk/extension/src/main.c

@@ -14,4 +14,4 @@ int start(int bar)
 	printk("foo(%d) is %d\n", bar, foo(bar));
 	return 0;
 }
-LL_EXTENSION_SYMBOL(start);
+EXPORT_SYMBOL(start);

tests/subsys/llext/simple/src/find_section_ext.c

@@ -22,4 +22,4 @@ void test_entry(void)
 	/* unused */
 }
 
-LL_EXTENSION_SYMBOL(number);
+EXPORT_SYMBOL(number);

tests/subsys/llext/simple/src/hello_world_ext.c

@@ -24,4 +24,4 @@ void test_entry(void)
 	printk("A number is %u\n", number);
 	zassert_equal(number, 42);
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/logging_ext.c

@@ -23,4 +23,4 @@ void test_entry(void)
 	LOG_INF("hello world");
 	LOG_INF("A number is %" PRIu32, number);
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);

tests/subsys/llext/simple/src/movwmovt_ext.c

@@ -32,4 +32,4 @@ void test_entry(void)
 	__asm volatile ("blx r0");
 	zassert_equal(test_var, 1, "mov.w and mov.t test failed");
 }
-LL_EXTENSION_SYMBOL(test_entry);
+EXPORT_SYMBOL(test_entry);