SPI fixes for buggy components (#5446)

esphome/components/spi/__init__.py

@@ -28,7 +28,7 @@ from esphome.const import (
 )
 from esphome.core import coroutine_with_priority, CORE
 
-CODEOWNERS = ["@esphome/core"]
+CODEOWNERS = ["@esphome/core", "@clydebarrow"]
 spi_ns = cg.esphome_ns.namespace("spi")
 SPIComponent = spi_ns.class_("SPIComponent", cg.Component)
 SPIDevice = spi_ns.class_("SPIDevice")

esphome/components/spi/spi.h

@@ -248,6 +248,7 @@ class SPIDelegateDummy : public SPIDelegate {
   SPIDelegateDummy() = default;
 
   uint8_t transfer(uint8_t data) override { return 0; }
+  void end_transaction() override{};
 
   void begin_transaction() override;
 };