event: Convert existing spy records to simple

Very few of the existing event-spy records use the arguments they are
passed. Update them to use a simple spy instead, to simplify the code.

Where an adaptor function is currently used, remove it where possible.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/ivybridge/cpu.c b/arch/x86/cpu/ivybridge/cpu.c
index c988d7f..e71a10b 100644
--- a/arch/x86/cpu/ivybridge/cpu.c
+++ b/arch/x86/cpu/ivybridge/cpu.c
@@ -54,7 +54,7 @@
 	return x86_cpu_init_f();
 }
 
-static int ivybridge_cpu_init(void *ctx, struct event *ev)
+static int ivybridge_cpu_init(void)
 {
 	struct pci_controller *hose;
 	struct udevice *bus, *dev;
@@ -86,7 +86,7 @@
 
 	return 0;
 }
-EVENT_SPY(EVT_DM_POST_INIT_F, ivybridge_cpu_init);
+EVENT_SPY_SIMPLE(EVT_DM_POST_INIT_F, ivybridge_cpu_init);
 
 #define PCH_EHCI0_TEMP_BAR0 0xe8000000
 #define PCH_EHCI1_TEMP_BAR0 0xe8000400