libcamera: yaml_parser: Rename Getter to Accessor

In preparation for support to set the value of a YamlObject, rename the
Getter structure to Accessor. The structure will be extended with a
set() function.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Isaac Scott <isaac.scott@ideasonboard.com>

src/ipa/libipa/lsc_polynomial.h

@@ -81,7 +81,7 @@ private:
 #ifndef __DOXYGEN__
 
 template<>
-struct YamlObject::Getter<ipa::LscPolynomial> {
+struct YamlObject::Accessor<ipa::LscPolynomial> {
 	std::optional<ipa::LscPolynomial> get(const YamlObject &obj) const
 	{
 		std::optional<double> cx = obj["cx"].get<double>();

src/ipa/libipa/pwl.cpp

@@ -435,7 +435,7 @@ std::string Pwl::toString() const
  */
 template<>
 std::optional<ipa::Pwl>
-YamlObject::Getter<ipa::Pwl>::get(const YamlObject &obj) const
+YamlObject::Accessor<ipa::Pwl>::get(const YamlObject &obj) const
 {
 	/* Treat a single value as single point PWL. */
 	if (obj.isValue()) {