[ALSA] sound/isa/: cleanups

GUS Library
This patch contains the following possible cleanups:
- make needlesly global code static
- #if 0 the following unused global functions:
  - gus/gus_volume.c: snd_gf1_gvol_to_lvol_raw
  - gus/gus_volume.c: snd_gf1_calc_ramp_rate
  - gus/gus_volume.c: snd_gf1_compute_vibrato
  - gus/gus_volume.c: snd_gf1_compute_pitchbend
  - gus/gus_volume.c: snd_gf1_compute_freq
  - gus/gus_io.c: snd_gf1_i_adlib_write
  - gus/gus_io.c: snd_gf1_i_write_addr
  - gus/gus_io.c: snd_gf1_pokew
  - gus/gus_io.c: snd_gf1_peekw
  - gus/gus_io.c: snd_gf1_dram_setmem
  - gus/gus_io.c: snd_gf1_print_global_registers
  - gus/gus_io.c: snd_gf1_print_setup_registers
  - gus/gus_io.c: snd_gf1_peek_print_block
  - gus/gus_io.c: snd_gf1_print_setup_registers
  - gus/gus_io.c: snd_gf1_peek_print_block
- #if 0 the following unused global variable:
  - gus/gus_tables.h: snd_gf1_scale_table
- remove the following unneeded EXPORT_SYMBOL's:
  - gus/gus_main.c: snd_gf1_i_write16
  - gus/gus_main.c: snd_gf1_start
  - gus/gus_main.c: snd_gf1_stop

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/gus/gus_mem.c b/sound/isa/gus/gus_mem.c
index bfc2b91..609838e 100644
--- a/sound/isa/gus/gus_mem.c
+++ b/sound/isa/gus/gus_mem.c
@@ -39,8 +39,8 @@
 	}
 }
 
-snd_gf1_mem_block_t *snd_gf1_mem_xalloc(snd_gf1_mem_t * alloc,
-				        snd_gf1_mem_block_t * block)
+static snd_gf1_mem_block_t *snd_gf1_mem_xalloc(snd_gf1_mem_t * alloc,
+					       snd_gf1_mem_block_t * block)
 {
 	snd_gf1_mem_block_t *pblock, *nblock;
 
@@ -105,8 +105,8 @@
 	return 0;
 }
 
-snd_gf1_mem_block_t *snd_gf1_mem_look(snd_gf1_mem_t * alloc,
-				      unsigned int address)
+static snd_gf1_mem_block_t *snd_gf1_mem_look(snd_gf1_mem_t * alloc,
+					     unsigned int address)
 {
 	snd_gf1_mem_block_t *block;
 
@@ -118,8 +118,8 @@
 	return NULL;
 }
 
-snd_gf1_mem_block_t *snd_gf1_mem_share(snd_gf1_mem_t * alloc,
-				       unsigned int *share_id)
+static snd_gf1_mem_block_t *snd_gf1_mem_share(snd_gf1_mem_t * alloc,
+					      unsigned int *share_id)
 {
 	snd_gf1_mem_block_t *block;