[U-Boot] [PATCH v2] armv7m: cache: add invalidate_icache_all() stub

[Giulio Benetti]

This commit:
https://gitlab.denx.de/u-boot/u-boot/commit/d409c962169bd293e39386d0ddfa64d5222a3be4
causes build failure with ICACHE enabled. This is due to missing
invalidate_icache_all() stub. Let's add empty invalidate_icache_all() in
the case where ICACHE is not enabled.

Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
---
V1->V2:
* substitute 'return 0;' with 'return;' since function returns void
---
 arch/arm/cpu/armv7m/cache.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/cpu/armv7m/cache.c b/arch/arm/cpu/armv7m/cache.c
index 0ccd7519a1..87c2baa60d 100644
--- a/arch/arm/cpu/armv7m/cache.c
+++ b/arch/arm/cpu/armv7m/cache.c
@@ -337,6 +337,11 @@ void icache_disable(void)
 	isb();	/* subsequent instructions fetch see cache disable effect */
 }
 #else
+void invalidate_icache_all(void)
+{
+	return;
+}
+
 void icache_enable(void)
 {
 	return;
-- 
2.20.1