[ALSA] Kconfig: clarify help text for external firmware entries

The external firmware files are not in the alsa-plugins but in the
alsa-firmware package.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/isa/Kconfig b/sound/isa/Kconfig
index 992e8c3..376c6b0 100644
--- a/sound/isa/Kconfig
+++ b/sound/isa/Kconfig
@@ -370,8 +370,8 @@
 	default y
 	help
 	  Say Y here to include the static firmware built in the kernel
-	  for SB16 CSP controller.  If you choose N here, the external
-	  firmware files from alsa-plugins pacakge are necessary.
+	  for the SB16 CSP controller.  If you choose N here, you need
+	  to install the firmware files from the alsa-firmware package.
 
 config SND_SGALAXY
 	tristate "Aztech Sound Galaxy"
@@ -417,7 +417,7 @@
 	default y
 	help
 	  Say Y here to include the static firmware built in the kernel
-	  for Wavefront driver.  If you choose N here, the external
-	  firmware files from alsa-plugins pacakge are necessary.
+	  for the Wavefront driver.  If you choose N here, you need to
+	  install the firmware files from the alsa-firmware package.
 
 endmenu