ptp: make ptp_clock_info const

Make these const as they are only used in a copy operation.
Done using Coccinelle.

@match disable optional_qualifier@
identifier s;
@@
static struct ptp_clock_info s = {...};

@ref@
position p;
identifier match.s;
@@
s@p

@good1@
position ref.p;
identifier match.s,f,c;
expression e;
@@
(
e = s@p
|
e = s@p.f
|
c(...,s@p.f,...)
|
c(...,s@p,...)
)

@bad depends on !good1@
position ref.p;
identifier match.s;
@@
s@p

@depends on forall !bad disable optional_qualifier@
identifier match.s;
@@
static
+ const
struct ptp_clock_info s;

Signed-off-by: Bhumika Goyal <[e-mail]>
Acked-by: Richard Cochran <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/ptp/ptp_dte.c

···
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_dte_caps = {
+static const struct ptp_clock_info ptp_dte_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "DTE PTP timer",
 	.max_adj	= 50000000,

drivers/ptp/ptp_ixp46x.c

···
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_ixp_caps = {
+static const struct ptp_clock_info ptp_ixp_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "IXP46X timer",
 	.max_adj	= 66666655,

drivers/ptp/ptp_kvm.c

···
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_kvm_caps = {
+static const struct ptp_clock_info ptp_kvm_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "KVM virtual PTP",
 	.max_adj	= 0,

drivers/ptp/ptp_pch.c

···
 	return -EOPNOTSUPP;
 }
 
-static struct ptp_clock_info ptp_pch_caps = {
+static const struct ptp_clock_info ptp_pch_caps = {
 	.owner		= THIS_MODULE,
 	.name		= "PCH timer",
 	.max_adj	= 50000000,