Update HX711_ADC.cpp

Efficiency and code size improvement.
The first term in most of the if statements was redundant anyway due to the preceding if but the daisy chain of if can be dispensed with completely.
Tested out of context with
#include <stdio.h>

void calculate(int samples)
{
    int divBit;
    
    printf("%d ", samples);
    samples >>= 1;
    for(divBit = 0; samples != 0; samples >>= 1, divBit++);
    printf("%d %d\n", 1 << divBit, divBit);
}

int main()
{
    calculate(3);
    calculate(7);
    calculate(8);
}

src/HX711_ADC.cpp

@@ -418,15 +418,16 @@ void HX711_ADC::setSamplesInUse(int samples)
 
 	if(samples <= SAMPLES)
 	{
-		if(samples == 0) {samplesInUse = SAMPLES; divBit = divBitCompiled;} //reset to the original value
-		else if(samples == 1) {samplesInUse = 1; divBit = 0;}
-		else if((samples > 1) && (samples < 4)) {samplesInUse = 2; divBit = 1;}
-		else if((samples >= 4) && (samples < 8)) {samplesInUse = 4; divBit = 2;}
-		else if((samples >= 8) && (samples < 16)) {samplesInUse = 8; divBit = 3;}
-		else if((samples >= 16) && (samples < 32)) {samplesInUse = 16; divBit = 4;}
-		else if((samples >= 32) && (samples < 64)) {samplesInUse = 32; divBit = 5;}
-		else if((samples >= 64) && (samples < 128)) {samplesInUse = 64; divBit = 6;}
-		else {samplesInUse = 128; divBit = 7;}
+		if(samples == 0) //reset to the original value
+		{
+			divBit = divBitCompiled;
+		} 
+		else
+		{
+			samples >>= 1;
+			for(divBit = 0; samples != 0; samples >>= 1, divBit++);
+		}
+		samplesInUse = 1 << divBit;
 
 		//replace the value of all samples in use with the last conversion value
 		if(samplesInUse != old_value)