host: Fix NIPC calculation in ddc/duc

Computed NIPC values now resolve to 1 for
RF_BW < 200 MHz and the workaround in X410_X4_100
bitfile to ensure correct NIPC has been reverted.

fpga/usrp3/top/x400/x410_X4_100_rfnoc_image_core.yml

@@ -16,18 +16,3 @@ inherit:
 
 parameters:
   RF_BW: 100
-
-noc_blocks:
-  # Workaround for bug in NIPC calculation in DDC/DUC block configuration yaml for BW < 200 MHz.
-  duc0:
-    parameters:
-      NIPC: 1
-  ddc0:
-    parameters:
-      NIPC: 1
-  duc1:
-    parameters:
-      NIPC: 1
-  ddc1:
-    parameters:
-      NIPC: 1

host/include/uhd/rfnoc/blocks/ddc.yml

@@ -19,7 +19,9 @@ parameters:
   # 2 that can support the given RF_BW, assuming each of the NIPC parallel
   # chains supports 200 MHz of RF bandwidth (with a corresponding sampling rate
   # of 250 MSps). If RF_BW is not provided or is zero, NIPC defaults to 1.
-  NIPC: "${ 1 << ((-(-int(config.device.parameters.get('RF_BW', 200) // 200)) - 1).bit_length()) }"
+  NIPC: >-
+    ${ 1 << ((max(1, -(-int(config.device.parameters.get('RF_BW', 200))
+    // 200)) - 1).bit_length()) }
 
 clocks:
   - name: rfnoc_chdr

host/include/uhd/rfnoc/blocks/duc.yml

@@ -19,7 +19,9 @@ parameters:
   # 2 that can support the given RF_BW, assuming each of the NIPC parallel
   # chains supports 200 MHz of RF bandwidth (with a corresponding sampling rate
   # of 250 MSps). If RF_BW is not provided or is zero, NIPC defaults to 1.
-  NIPC: "${ 1 << ((-(-int(config.device.parameters.get('RF_BW', 200) // 200)) - 1).bit_length()) }"
+  NIPC: >-
+    ${ 1 << ((max(1, -(-int(config.device.parameters.get('RF_BW', 200))
+    // 200)) - 1).bit_length()) }
 
 clocks:
   - name: rfnoc_chdr