bootstage: Change CONFIG_BOOTSTAGE_USER_COUNT to an int

There is no good read to make this hex, and integer is more natural for
this type of setting. Update it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index 761cfb6..63b3ffd 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -12,7 +12,7 @@
 CONFIG_SPL_LOAD_FIT=y
 CONFIG_BOOTSTAGE=y
 CONFIG_BOOTSTAGE_REPORT=y
-CONFIG_BOOTSTAGE_USER_COUNT=0x20
+CONFIG_BOOTSTAGE_USER_COUNT=32
 CONFIG_BOOTSTAGE_FDT=y
 CONFIG_BOOTSTAGE_STASH=y
 CONFIG_BOOTSTAGE_STASH_ADDR=0x0