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/board/starfive/visionfive2/spl.c b/board/starfive/visionfive2/spl.c
index 7acd399..ad5f71a 100644
--- a/board/starfive/visionfive2/spl.c
+++ b/board/starfive/visionfive2/spl.c
@@ -218,7 +218,7 @@
 	if (ret)
 		panic("spl_early_init() failed: %d\n", ret);
 
-	riscv_cpu_setup(NULL, NULL);
+	riscv_cpu_setup();
 	preloader_console_init();
 
 	/* Set the parent clock of cpu_root clock to pll0,