test: log functions with CONFIG_LOG=n

If CONFIG_LOG=n, we still expect output for log_err(), log_warning(),
log_notice(), log_info() and in case of DEBUG=1 also for log_debug().

Provide unit tests verifying this.

The tests depend on:

	CONFIG_CONSOLE_RECORD=y
	CONFIG_LOG=n
	CONFIG_UT_LOG=y

It may be necessary to increase the value of CONFIG_SYS_MALLOC_F_LEN to
accommodate CONFIG_CONSOLE_RECORD=y.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

MAINTAINERS

@@ -656,7 +656,7 @@ S:	Maintained
 T:	git https://gitlab.denx.de/u-boot/u-boot.git
 F:	common/log*
 F:	cmd/log.c
-F:	test/log/log_test.c
+F:	test/log/
 F:	test/py/tests/test_log.py
 
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