ide: fix section mismatch warning

[Sam Ravnborg <sam@ravnborg.org>]

In latest -mm ide-code.o gave a number of warnings like the following:

WARNING: drivers/ide/ide-core.o - Section mismatch: reference to    \
.init.text: from .text between 'init_module' (at offset 0x1f97) and \
'cleanup_module'

The warning was caused by init_module() calling parse_option() and
ide_init() both declared __init.

Declaring init_module() __init fixes the warnings.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
Compiletime tested with allmodconfig on amd64 only.

diff --git a/drivers/ide/ide.c b/drivers/ide/ide.c
index b2cc437..3fdab56 100644
--- a/drivers/ide/ide.c
+++ b/drivers/ide/ide.c
@@ -2058,7 +2058,7 @@ static void __init parse_options (char *
 	}
 }
 
-int init_module (void)
+int __init init_module (void)
 {
 	parse_options(options);
 	return ide_init();
-
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