Remove execute permissions from source files

Signed-off-by: Thomas Weber <weber@corscience.de>
diff --git a/arch/arm/cpu/armv7/imx-common/timer.c b/arch/arm/cpu/armv7/imx-common/timer.c
old mode 100755
new mode 100644
diff --git a/drivers/fpga/ivm_core.c b/drivers/fpga/ivm_core.c
old mode 100755
new mode 100644
diff --git a/include/lattice.h b/include/lattice.h
old mode 100755
new mode 100644