ltc_2378: Remove IOB TRUE from CNV pin

Signed-off-by: sarpadi <sergiu.arpadi@analog.com>

Author: sarpadi

projects/ltc2378_fmc/zed/system_constr.xdc

@@ -8,7 +8,7 @@
 set_property -dict {PACKAGE_PIN M19 IOSTANDARD LVCMOS25 IOB TRUE} [get_ports ltc2378_spi_sclk]; ## G6   FMC_LA00_CC_P   IO_L13P_T2_MRCC_34
 set_property -dict {PACKAGE_PIN P17 IOSTANDARD LVCMOS25 IOB TRUE} [get_ports ltc2378_spi_sdi];  ## H7   FMC_LA02_P      IO_L20P_T3_34
 set_property -dict {PACKAGE_PIN L22 IOSTANDARD LVCMOS25 IOB TRUE} [get_ports ltc2378_spi_sdo];  ## C11  FMC_LA06_N      IO_L10N_T1_34
-set_property -dict {PACKAGE_PIN N19 IOSTANDARD LVCMOS25 IOB TRUE} [get_ports ltc2378_spi_cnv];  ## D8   FMC_LA01_CC_P   IO_L14P_T2_SRCC_34
+set_property -dict {PACKAGE_PIN N19 IOSTANDARD LVCMOS25} [get_ports ltc2378_spi_cnv];           ## D8   FMC_LA01_CC_P   IO_L14P_T2_SRCC_34
 
 set_property -dict {PACKAGE_PIN L18 IOSTANDARD LVCMOS25} [get_ports ltc2378_ext_clk];           ## H4   FMC_CLK0_M2C_P  IO_L12P_T1_MRCC_34