[ Upstream commit 41b3588dba6ef4b7995735a97e47ff0aeea6c276 ]

If we do a clk_get() for a clock that does not exists, we have
_ti_omap4_clkctrl_xlate() return uninitialized data if no match
is found. This can be seen in some cases with SLAB_DEBUG enabled:

Unable to handle kernel paging request at virtual address 5a5a5a5a
...
clk_hw_create_clk.part.33
sysc_notifier_call
notifier_call_chain
blocking_notifier_call_chain
device_add

Let's fix this by setting a found flag only when we find a match.
Reported-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Fixes: 88a17252 ("clk: ti: add support for clkctrl clocks")
Signed-off-by: NTony Lindgren <tony@atomide.com>
Tested-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: NTomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: NStephen Boyd <sboyd@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>