omap3: hwmod: disable hwspinlocks

The hwspinlock hwmod is implemented only for omap4 and not
supported for omap3 and omap2.

This patch enable hwspinlocks only for omap4.

Boot warning on omap3:

[    0.000000] ------------[ cut here ]------------
[    0.000000] WARNING: at arch/arm/mach-omap2/hwspinlocks.c:61 hwspinlocks_init+0x24/0xbc()
[    0.000000] Modules linked in:
[    0.000000] [<c00470ec>] (unwind_backtrace+0x0/0xe4) from [<c0078978>] (warn_slowpath_common+0x4c/0x64)
[    0.000000] [<c0078978>] (warn_slowpath_common+0x4c/0x64) from [<c00789a8>] (warn_slowpath_null+0x18/0x1c)
[    0.000000] [<c00789a8>] (warn_slowpath_null+0x18/0x1c) from [<c0017040>] (hwspinlocks_init+0x24/0xbc)
[    0.000000] [<c0017040>] (hwspinlocks_init+0x24/0xbc) from [<c0041340>] (do_one_initcall+0x58/0x1b4)
[    0.000000] [<c0041340>] (do_one_initcall+0x58/0x1b4) from [<c0008574>] (kernel_init+0x98/0x150)
[    0.000000] [<c0008574>] (kernel_init+0x98/0x150) from [<c0042970>] (kernel_thread_exit+0x0/0x8)
[    0.000000] ---[ end trace 1b75b31a2719ed1c ]--

Signed-off-by: G, Manjunath Kondaiah <[email protected]>

Author: G, Manjunath Kondaiah

arch/arm/mach-omap2/hwspinlocks.c

@@ -56,6 +56,9 @@ int __init hwspinlocks_init(void)
 	struct omap_hwmod *oh;
 	char *oh_name, *pdev_name;
 
+	if (!cpu_is_omap44xx())
+		return -EINVAL;
+
 	oh_name = "spinlock";
 	oh = omap_hwmod_lookup(oh_name);
 	if (WARN_ON(oh == NULL))