soc: ti: pruss: Correct the pruss_clk_init error trace text

The pruss_clk_init() function can register more than one clock.
Correct the existing misleading error trace upon a failure within
this function.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>