libcamera: ipa_data_serializer: Remove some vector reserve() calls

`appendPOD()` does a single insertion, so if only a single `appendPOD()`
will be called on a vector before returning, then calling `reserve()`
is not that useful, so remove it.

Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com>
Reviewed-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

include/libcamera/internal/ipa_data_serializer.h

@@ -309,7 +309,6 @@ public:
 	serialize(const Flags<E> &data, [[maybe_unused]] ControlSerializer *cs = nullptr)
 	{
 		std::vector<uint8_t> dataVec;
-		dataVec.reserve(sizeof(Flags<E>));
 		appendPOD<uint32_t>(dataVec, static_cast<typename Flags<E>::Type>(data));
 
 		return { dataVec, {} };

src/libcamera/ipa_data_serializer.cpp

@@ -196,7 +196,6 @@ IPADataSerializer<type>::serialize(const type &data,			\
 				  [[maybe_unused]] ControlSerializer *cs) \
 {									\
 	std::vector<uint8_t> dataVec;					\
-	dataVec.reserve(sizeof(type));					\
 	appendPOD<type>(dataVec, data);					\
 									\
 	return { dataVec, {} };						\