soc: intel_s1000: fix XCC build error when CONFIG_LOG_MINIMAL=y

During LOG_*() macro expansions, XCC expands everything even though
IS_ENABLED() is used. This resulting in various log*() functions
(e.g. log_0(), log_1(), etc.) being required for linking. However,
when CONFIG_LOG_MINIMAL=y, those functions are not compiled from
the logging subsystem. Therefore, to get past the linking error,
dummy versions are being provided.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>

soc/xtensa/intel_s1000/xcc/CMakeLists.txt

@@ -2,3 +2,4 @@
 
 zephyr_library_sources_ifdef(CONFIG_CPLUSPLUS cpp_fixes.c)
 zephyr_library_sources_ifdef(CONFIG_NEWLIB_LIBC newlib_fixes.c)
+zephyr_library_sources_ifdef(CONFIG_LOG_MINIMAL log_minimal_fixes.c)

soc/xtensa/intel_s1000/xcc/log_minimal_fixes.c

@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2019, Intel Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <logging/log_msg.h>
+#include <logging/log_instance.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <syscall.h>
+#include <sys/util.h>
+#include <sys/printk.h>
+
+void log_0(const char *str, struct log_msg_ids src_level)
+{
+}
+
+void log_1(const char *str,
+	   log_arg_t arg1,
+	   struct log_msg_ids src_level)
+{
+}
+
+void log_2(const char *str,
+	   log_arg_t arg1,
+	   log_arg_t arg2,
+	   struct log_msg_ids src_level)
+{
+}
+
+void log_3(const char *str,
+	   log_arg_t arg1,
+	   log_arg_t arg2,
+	   log_arg_t arg3,
+	   struct log_msg_ids src_level)
+{
+}
+
+void log_n(const char *str,
+	   log_arg_t *args,
+	   u32_t narg,
+	   struct log_msg_ids src_level)
+{
+}
+
+void log_hexdump(const char *str,
+		 const u8_t *data,
+		 u32_t length,
+		 struct log_msg_ids src_level)
+{
+}
+
+void log_string_sync(struct log_msg_ids src_level, const char *fmt, ...)
+{
+}
+
+void log_hexdump_sync(struct log_msg_ids src_level, const char *metadata,
+		      const u8_t *data, u32_t len)
+{
+}
+
+void log_generic(struct log_msg_ids src_level, const char *fmt, va_list ap)
+{
+}
+
+void log_generic_from_user(struct log_msg_ids src_level,
+			   const char *fmt, va_list ap)
+{
+}
+
+bool log_is_strdup(const void *buf)
+{
+	return false;
+}
+
+void log_free(void *buf)
+{
+}
+
+u32_t log_get_strdup_pool_utilization(void)
+{
+	return 0;
+}
+
+u32_t log_get_strdup_longest_string(void)
+{
+	return 0;
+}
+
+void log_dropped(void)
+{
+}
+
+void __printf_like(2, 3) log_from_user(struct log_msg_ids src_level,
+				       const char *fmt, ...)
+{
+}
+
+void log_hexdump_from_user(struct log_msg_ids src_level, const char *metadata,
+			   const u8_t *data, u32_t len)
+{
+}