[libata] beautify module parameters

1. add defaults to description where possible
2. add value definition (off=0, on=1) where missing

v2: reformatted as per request by Jeff Garzik <jgarzik@pobox.com>
    "Enable foo (0=off, 1=on [default])"
Signed-off-by: Evgeni Golov <sargentd@die-welt.net>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

drivers/ata/libata-core.c

@@ -125,19 +125,19 @@ MODULE_PARM_DESC(force, "Force ATA configurations including cable type, link spe
 
 static int atapi_enabled = 1;
 module_param(atapi_enabled, int, 0444);
-MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
+MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on [default])");
 
 static int atapi_dmadir = 0;
 module_param(atapi_dmadir, int, 0444);
-MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off, 1=on)");
+MODULE_PARM_DESC(atapi_dmadir, "Enable ATAPI DMADIR bridge support (0=off [default], 1=on)");
 
 int atapi_passthru16 = 1;
 module_param(atapi_passthru16, int, 0444);
-MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices; on by default (0=off, 1=on)");
+MODULE_PARM_DESC(atapi_passthru16, "Enable ATA_16 passthru for ATAPI devices (0=off, 1=on [default])");
 
 int libata_fua = 0;
 module_param_named(fua, libata_fua, int, 0444);
-MODULE_PARM_DESC(fua, "FUA support (0=off, 1=on)");
+MODULE_PARM_DESC(fua, "FUA support (0=off [default], 1=on)");
 
 static int ata_ignore_hpa;
 module_param_named(ignore_hpa, ata_ignore_hpa, int, 0644);
@@ -153,11 +153,11 @@ MODULE_PARM_DESC(ata_probe_timeout, "Set ATA probing timeout (seconds)");
 
 int libata_noacpi = 0;
 module_param_named(noacpi, libata_noacpi, int, 0444);
-MODULE_PARM_DESC(noacpi, "Disables the use of ACPI in probe/suspend/resume when set");
+MODULE_PARM_DESC(noacpi, "Disable the use of ACPI in probe/suspend/resume (0=off [default], 1=on)");
 
 int libata_allow_tpm = 0;
 module_param_named(allow_tpm, libata_allow_tpm, int, 0444);
-MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands");
+MODULE_PARM_DESC(allow_tpm, "Permit the use of TPM commands (0=off [default], 1=on)");
 
 MODULE_AUTHOR("Jeff Garzik");
 MODULE_DESCRIPTION("Library module for ATA devices");