[U-Boot] [PATCH v2 14/28] tegra: clock: Avoid a divide-by-zero error

[sjg at google.com]

The clock fix-up for tegra is still present in the code. It causes a
divide-by-zero bug after relocation when chain-loading U-Boot from
coreboot. Fix this by adding a check.

Signed-off-by: Simon Glass <sjg at chromium.org>
Fixes: 7468676 (ARM: tegra: fix clock_get_periph_rate() for UART clocks)
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Changes in v2: None

 arch/arm/mach-tegra/clock.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Applied to u-boot-dm, thanks!