irq/platform-msi: Fix comment about maximal MSIs

Commit aff5e06b0d ("irq/platform-MSI: Increase the maximum MSIs the MSI
framework can support") increased the maximum MSIs to 2048.

Fix the comment to reflect that.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Cc: gregkh@linuxfoundation.org
Cc: majun258@huawei.com
Link: http://lkml.kernel.org/r/1484592500-15400-1-git-send-email-mbrugger@suse.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/base/platform-msi.c

@@ -206,7 +206,7 @@ platform_msi_alloc_priv_data(struct device *dev, unsigned int nvec,
 {
 	struct platform_msi_priv_data *datap;
 	/*
-	 * Limit the number of interrupts to 256 per device. Should we
+	 * Limit the number of interrupts to 2048 per device. Should we
 	 * need to bump this up, DEV_ID_SHIFT should be adjusted
 	 * accordingly (which would impact the max number of MSI
 	 * capable devices).