[ALSA] Enable Kconfig options for external firmwares

Some drivers are already ifdefs for enabling external firmwares
but not defined in Kconfig.  Now they appear as the kernel configs.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/isa/sb/sb16_csp.c b/sound/isa/sb/sb16_csp.c
index 3d9d7e0..ef71e50 100644
--- a/sound/isa/sb/sb16_csp.c
+++ b/sound/isa/sb/sb16_csp.c
@@ -690,9 +690,7 @@
 	return err;
 }
 
-#define FIRMWARE_IN_THE_KERNEL
-
-#ifdef FIRMWARE_IN_THE_KERNEL
+#ifdef CONFIG_SND_SB16_CSP_FIRMWARE_IN_KERNEL
 #include "sb16_csp_codecs.h"
 
 static const struct firmware snd_sb_csp_static_programs[] = {
@@ -724,7 +722,7 @@
 		if (err >= 0)
 			p->csp_programs[index] = program;
 		else {
-#ifdef FIRMWARE_IN_THE_KERNEL
+#ifdef CONFIG_SND_SB16_CSP_FIRMWARE_IN_KERNEL
 			program = &snd_sb_csp_static_programs[index];
 #else
 			return err;